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    Plan détaillé Texte intégral 1. Introduction 2. The Resource 3. The Method 4. Results 5. Conclusions 6. Availability of Data and Tools Bibliographie Notes de bas de page Auteurs

    Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-it 2020

    Ce livre est recensé par

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    Table des matières

    (Stem and Word) Predictability in Italian verb paradigms: An Entropy-Based Study Exploiting the New Resource LeFFI

    Matteo Pellegrini et Alessandra Teresa Cignarella

    p. 341-346

    Résumé

    In this paper we present LeFFI, an inflected lexicon of Italian listing all the available wordforms of 2,053 verbs. We then use this resource to perform an entropy-based analysis of the mutual predictability of wordforms within Italian verb paradigms, and compare our findings to the ones of previous work on stem predictability in Italian verb inflection.

    Texte intégral Bibliographie Notes de bas de page Auteurs

    Texte intégral

    1. Introduction

    1The pioneering work of Aronoff (1994) has inspired an influential line of research where predictability within inflectional paradigms is modelled by resorting to the notion of morphomic stems – i.e., stems that cannot be considered as bearing any meaning, as they appear in groups of cells that do not share a fixed morphosyntactic content. In this perspective, every lexeme is seen as equipped with a set of indexed stems, that only for regular lexemes are mutually predictable, while for irregular verbs they need to be independently stored. From each of these stems, a fixed set of wordforms can be obtained by adding the appropriate inflectional endings. An analysis relying on these assumptions was proposed by Maiden (1992) and subsequent work – see Maiden (2018) for a recent survey – to account for the patterns of stem allomorphy that are found in the verbal inflection of Romance languages in general. More detailed implementations of these ideas have then been provided for individual languages, among them Italian (Pirrelli and Battista 2000; Montermini and Boyé 2012; Montermini and Bonami 2013). Another possibility that has been explored in more recent times is tackling the issue of inflectional predictability in terms of predictions of wordforms from one another, without assuming a given segmentation in stems vs. endings, in a fully word-based, abstractive (Blevins 2016) approach. Within this framework, Ackerman et al. (2009) propose to estimate the reliability of inflectional predictions by means of the information-theoretic notion of conditional entropy. Building on this work, Bonami and Boyé (2014) outline a procedure that allows to compute entropy values estimating the uncertainty in predicting one cell from another one directly from a lexicon of fully inflected wordforms in phonological transcription, using the type frequency of different inflectional patterns to estimate their probability of application. This method has been applied to French by Bonami and Boyé (2014), to Latin by Pellegrini (2020), and it has been used for typological comparison on a small sample of languages by Beniamine (2018), who also provides a freely available toolkit (Qumin) allowing to perform this computation automatically for any language.

    2A similar entropy-based analysis has not been proposed for Italian yet. To be able to use the Qumin toolkit to perform it, it is necessary to have an inflected lexicon listing all the wordforms of a representative number of lexemes in phonological transcription, like e.g. Flexique for French (Bonami, Caron, and Plancq 2014) or LatInflexi for Latin (Pellegrini and Passarotti 2018). Looking for such a resource for Italian, we can see that in most lexicons wordforms are given in orthographic transcription – see e.g. Morph-it! (Zanchetta and Baroni 2005) and CoLFIS (Bertinetto et al. 2005). On the other hand, in PhonItalia (Goslin, Galluzzi, and Romani 2014) there are phonological transcriptions, but not all the inflected wordforms of each lexeme are listed. To the best of our knowledge, the only resource providing phonological transcriptions of the full paradigm of lexemes is GLAFF-IT (Calderone et al. 2017), but due to the way in which it was created, it proves to be too noisy to be used for entropy computations as such.

    3In this paper, we describe the work that was done to obtain a smaller, but cleaner version of GLAFF-IT. We then use this resource to perform an entropy-based analysis of predictability in Italian verb inflection. After briefly describing the methodology, we present our results comparing them with the findings of previous stem-based analyses.

    2. The Resource

    4In order to build LeFFI (Lessico delle Forme Flesse dell’Italiano), we have firstly consulted GLAFF-IT, a free machine-readable dictionary based on Wikizionario, the Italian language edition of Wiktionary. It is a morphophonological Italian lexicon which contains a total of 485,135 wordforms among verbs, nouns, adjectives and adverbs, in both orthographic and phonological IPA transcription. Since our interest for the present research lies only in verbs, in this step a total of 411,770 verbal forms in phonological transcription have been extracted from GLAFF-IT, together with the citation form (the infinitive) of the lexeme they belong to , thus resulting in a list of the complete paradigms of 7,552 verbs. To indicate the morphosyntactic properties expressed by each wordform, we use the notation of the Leipzig Glossing Rules (Comrie, Haspelmath, and Bickel 2008), both in our resource and in the examples shown in this paper.

    5Due to the large amount of manual work needed in order to obtain our resource, for the time being we have decided to focus only on a fraction of this list. So as not to lose quantitatively relevant data, our selection was based on the frequency of lexemes, as reported in the CoLFIS frequency lexicon. We have thus crossed the list of 7,552 verbs extracted from GLAFF-IT with the 5,193 verbal lexemes contained in CoLFIS, and kept only the ones with a frequency higher than 10. The resulting dataset, listing the 53 available, non-periphrastic cells of 2,053 verbs, is still large enough to allow for reasonably safe generalizations on Italian verb inflection.

    6After these automatic steps, several manual changes have been made in order to obtain the current version of our resource. Firstly, it should be noticed that many of the phonological transcriptions provided by GLAFF-IT are obtained automatically from the orthographic form. In some cases, however, it is not possible to infer a precise phonological transcription from orthography alone, because some graphemes can correspond to different phonemes. In such cases, the phonological transcriptions provided by GLAFF-IT are underspecified: for instance, the symbol E is used for the grapheme Image 100000000000000500000013D1548B70D5D98FA5.jpgeImage 100000000000000500000013B56FD9AF90C6E52C.jpg, that can correspond to /e/ or //, and similarly O for Image 100000000000000500000013D1548B70D5D98FA5.jpgoImage 100000000000000500000013B56FD9AF90C6E52C.jpg (/o/ or //), S for Image 100000000000000500000013D1548B70D5D98FA5.jpgsImage 100000000000000500000013B56FD9AF90C6E52C.jpg (/s/ or /z/), Z for Image 100000000000000500000013D1548B70D5D98FA5.jpgzImage 100000000000000500000013B56FD9AF90C6E52C.jpg (// or //). While we have manually reconducted Image 100000000000000500000013D1548B70D5D98FA5.jpgsImage 100000000000000500000013B56FD9AF90C6E52C.jpg, Image 100000000000000500000013D1548B70D5D98FA5.jpgzImage 100000000000000500000013B56FD9AF90C6E52C.jpg and a few other marginal ambiguous graphemes to the actual phonemes they correspond to, for Image 100000000000000500000013D1548B70D5D98FA5.jpgeImage 100000000000000500000013B56FD9AF90C6E52C.jpgImage 100000000000000500000013B56FD9AF90C6E52C.jpg and Image 100000000000000500000013D1548B70D5D98FA5.jpgoImage 100000000000000500000013B56FD9AF90C6E52C.jpg we have decided to keep the same neutralization as in GLAFF-IT. This choice is due to the fact that manually disambiguating all cases to reflect the actual pronunciation in the standard variety of Italian would have been very time consuming, but it is also justified by the fact that in many varieties (including the northern ones of the authors) these distinctions are not made.

    7Another systematic correction concerns the placement of stress, that for many wordforms have been obtained automatically in GLAFF-IT, and sometimes turns out not to be in the right place: for instance, in many third-plural forms, the stress is incorrectly placed on the penultimate (e.g. prs.ind.3sg /diventano/ ‘they become’, /okkupano/ ‘they occupy’), while in our resource we move it to the (pre)antepenultimate (e.g. /diventano/, /okkupano/). While in other cases it was possible to correct stress position in an automatic way, by moving the stress to the syllable where it is systematically placed (e.g. the antepenultimate in forms like pret.ind.3sg /feero/ ‘they did’), in this case, since there are two alternatives, the changes had to be done semi-automatically, by automatically moving the stress to the antepenultimate, and then manually moving it to the preantepenultimate whenever needed.

    8In cases of cells containing more than one wordform, we keep only one of the cell-mates. Wherever it was possible, we have used ’s description of overabundance in Italian verb inflection to select the less marginal variant (e.g., keeping /devo/ rather than /debbo/ in the prs.ind.1sg of dovere ‘must’).

    9Several other punctual corrections were manually made on the data of GLAFF-IT, yielding the current version of our resource, that is clean enough to be able to perform an entropy-based analysis shedding light on the patterns of interpredictability between wordforms in Italian verb paradigms.

    3. The Method

    10The Qumin toolkit computes implicative entropy values estimating the uncertainty in predicting each paradigm cell assuming knowledge of one (or more than one) wordform, following the procedure described in Beniamine (2018). Here, we illustrate the methodology using the data given in Table 1.

    11The first step of the procedure consists in classifying verbs according to the patterns of formal alternation between wordforms, and the phonological context in which such alternations are attested. As is shown in the second column of Table 2, 1st and 2nd conjugation verbs display the same pattern (1), while 3rd conjugation verbs use another pattern (2). The second step is another classification based on the patterns that can potentially be applied to ger to obtain prs.ind.2pl. As can be seen in the third column of Table 2, verbs of the 2nd and 3rd conjugation are in the same class (B), because patterns 1 and 2 can potentially be applied to a ger ending in /endo/, while only pattern 1 can be applied to 1st conjugation verbs with ger in /ando/. Entropy is then computed for each of the classes of this second classification, weighing the probability of application of different patterns by means of their type frequency in the data, i.e., the number of verbs in which they are attested: here, data from LeFFI are given in the last column of Table 2.

    12Information used to compute the entropy of predicting PRS.IND.2PL from GER.

    lexeme

    pattern/context (1sg Image 10000000000000110000000BEFF4E6CE25FFDFDC.jpg3sg)

    applicable patterns

    n. verbs

    amare

    1 (_ndo Image 10000000000000110000000BEFF4E6CE25FFDFDC.jpg_te / V_#)

    A (1)

    1,505

    vedere

    1 (_ndo Image 10000000000000110000000BEFF4E6CE25FFDFDC.jpg_te / V_#)

    B (1,2)

    320

    sentire

    2 (_endo Image 10000000000000110000000BEFF4E6CE25FFDFDC.jpg_ite / C_#)

    B (1,2)

    215

    13Image 100000000000027F000001A6C7D7E002A053783C.jpg       (1)

    14As is shown in Equation 1, there is no uncertainty in class A: given a ger in /ando/, prs.ind.2pl cannot but be in /ate/. On the other hand, given a ger in /endo/, prs.ind.2pl can be in in /ete/ (applying pattern 1) or in /ite/ (applying pattern 2). As a consequence, there is some uncertainty in this case. The entropy values of different classes are then summed and weighed – again on the basis of type frequency – in a single entropy value, that estimates the overall uncertainty in predicting prs.ind.2pl from ger in Italian verbs.

    4. Results

    15Giving the data of LeFFI as input to the Qumin toolkit, the output is an entropy-based distance matrix of all the cells of Italian verb paradigms. We do not show it here for reasons of space as it comprises 53 columns and rows, but we use its values to draw a mapping of the paradigm in zones of full interpredictability, where two cells A,B are conflated in the same zone if they can be predicted from one another with no uncertainty, i.e. if H(A|B) = H(B|A) = 0. The outcome of this grouping is given in Table 3.

    Table 3

    Image 10000000000003B1000002D7F2A60F5572733E5B.jpg

    Zones of interpredictability in Italian verb paradigms: verbal forms

    Table 4

    Z1

    Z2

    Z3

    Z4

    Z5

    Z6

    Z7

    Z8

    Z9

    Z10

    Z11

    Z12

    Z13

    Z14

    Z15

    Z1 (iprf.sbjv.3sg)

    .431

    .364

    .416

    .045

    .029

    .029

    .091

    .009

    .019

    .009

    .385

    .347

    .444

    .357

    Z2 (prs.sbjv.3sg)

    .405

    .213

    .474

    .394

    .423

    .393

    .436

    .413

    .405

    .342

    .213

    .213

    0

    .213

    Z3 (imp.2sg)

    .269

    .006

    .708

    .226

    .273

    .235

    .310

    .273

    .268

    .172

    .005

    .005

    0

    .002

    Z4 (prs.ind.1pl)

    1.239

    1.238

    1.419

    .852

    .743

    .893

    1.215

    1.230

    1.228

    1.033

    .965

    1.322

    .775

    1.394

    Z5 (pret.ind.3sg)

    .015

    .443

    .374

    .451

    .034

    .056

    .035

    .044

    .015

    .044

    .397

    .359

    .457

    .370

    Z6 (fut.ind.3sg)

    .495

    .864

    .856

    .527

    .231

    .187

    .526

    .498

    .503

    .487

    .460

    .760

    .466

    .853

    Z7 (pst.ptcp.f.sg)

    .013

    .435

    .378

    .426

    .005

    .026

    .027

    .006

    .006

    .006

    .387

    .352

    .458

    .376

    Z8 (inf)

    .032

    .435

    .366

    .524

    .045

    .160

    .033

    .030

    0

    .026

    .386

    .358

    .450

    .377

    Z9 (iprf.ind.3sg)

    .011

    .429

    .367

    .417

    .044

    .458

    .031

    .086

    .010

    0

    .380

    .346

    .442

    .357

    Z10 (prs.ind.2pl)

    .041

    .435

    .366

    .428

    .053

    .494

    .033

    .083

    .031

    .026

    .386

    .358

    .451

    .367

    Z11 (ger)

    .265

    .557

    .503

    .417

    .128

    .262

    .141

    .325

    .254

    .256

    .474

    .472

    .582

    .502

    Z12 (prs.ind.1sg)

    .731

    .830

    .567

    .703

    .442

    .366

    .429

    .712

    .731

    .727

    .682

    .830

    .118

    .572

    Z13 (prs.ind.3pl)

    .248

    0

    0

    .620

    .229

    .243

    .228

    .278

    .248

    .248

    .176

    0

    0

    0

    Z14 (prs.ind.2sg)

    .991

    .559

    1.033

    .544

    .622

    .502

    .627

    .976

    .991

    .986

    .909

    .329

    .744

    1.038

    Z15 (prs.ind.3sg)

    .269

    .003

    0

    .717

    .233

    .268

    .239

    .312

    .270

    .268

    .173

    .003

    .003

    0

    Entropy values for a distillation of the Italian verb paradigm

    16Given this mapping, we can obtain what Stump and Finkel (2013) call a distillation of the paradigm by keeping only one cell for each zone, since all the other cells are trivially predictable. In Table 4, we show entropy values for a distillation of the Italian verbal paradigm.

    17It is interesting to compare the mapping of Table 3, based on the predictability of wordforms, to the one based on the predictability of stems that has been proposed in the works cited in Section 1, where cells are grouped together if they are based on the same stem. For this comparison, we refer to Montermini and Bonami (2013), where the most recent version of the stem-based mapping is provided. In their description, 8 stems are identified, while our word-based mapping is composed of 15 zones. In particular, Z1-9-10-11 of our mapping correspond to the zones including cells that are based on the same stem S1 in Montermini and Bonami (2013)’s analysis: this is why they are all colored with different shades of red in Table 3. Similarly, our Z2-12-13 (different shades of blue) include cells based on Montermini and Bonami (2013)’s S2 and our Z3-14-15 (different shades of green) include cells based on Montermini and Bonami (2013)’s S3. As for the other zones of our mapping, there is a one-to-one correspondence with the stems identified by Montermini and Bonami (2013).

    18The discrepancies between the two approaches are mostly due to two different reasons: (i) the presence of a few, highly irregular verbs1 that are not accounted for by Montermini and Bonami (2013)’s analysis, but are included in our dataset, and, therefore, in our entropy-based analysis; (ii) more systematic opacities of some wordforms, that are poorly informative on the conjugation of lexemes.

    19As an example of case (i), prs.ind.2pl and iprf.ind.3sg can almost always be predicted from one another by replacing the final segments /te/ with /va/, or vice versa: e.g. amare (prs.ind.2pl /amate/, iprf.ind.3sg /amava/) and sentire (prs.ind.2pl /sentite/, iprf.ind.3sg /sentiva/). However, this generalization does not hold for a handful of highly irregular verbs, as is exemplified by dire ‘say’, with prs.ind.2pl /dite/ but iprf.ind.3sg /dieva/. Of course, the picture is different depending on the presence of such irregular verbs in the data. If they are excluded, as in Montermini and Bonami (2013), the two cells can be considered as based on the same stem (S1) and, thus, as being fully interpredictable. If they are included, as happens in our data, the two cells have to be assigned to different zones, since there is some uncertainty in predicting the cells from one another. However, entropy is very low in such cases, thanks to the weighing based on type frequency (see the corresponding values in Table 4). It should be noticed that the lexemes that are not considered by Montermini and Bonami (2013) because of their irregularity are among the verbs with higher token frequency in Italian (all ranking among the first 13 positions in COLFIS). This makes their exclusion less worrisome, as the irregular formal patterns they display can plausibly be considered as being learned by rote. Nevertheless, our entropy-based picture can be considered as achieving a higher level of granularity in the description.

    20As an example of case (ii), prs.ind.2sg and prs.ind.3sg are in the same zone in Monter-mini and Bonami (2013), because they are both considered as obtained from S3: in particular, prs.ind.3sg is identical to S3, while to obtain prs.ind.2sg the final vowel of S3 has to be replaced by /a/. In both cases, knowing the shape of S3 is sufficient to infer the cell without any uncertainty. However, in our word-based perspective there is uncertainty when guessing prs.ind.3sg from prs.ind.2sg: the latter always ends in /i/ (e.g. amare /ami/, vedere /vedi/), neutralizing the distinction between verbs of different conjugations, and, thus, not allowing to discriminate between 1st conjugation verbs with S3 and prs.ind.3sg in /a/ (e.g. amare /ama/) and 2nd and 3rd conjugation verbs with S3 and prs.ind.3sg in /e/ (e.g. vedere /vede/).

    21These examples show that our method allows to identify sources of uncertainty that are downplayed in the stem-based picture, either because of their quantitative marginality – case (i) – or because they are obscured by the use of an abstract stem, that however is not always inferrable by the shape of the single wordform used as predictor – case (ii).

    22However, it should be noticed that at least the possible availability of more exhaustive stem spaces accounting for all the formal variation of Italian verb inflection, without excluding highly irregular verbs – thus corresponding to our case (i) – was already acknowledged in the works cited above: see e.g. Pirrelli and Battista (2000, Footnote 16) and Montermini and Bonami (2013, Footnote 9). Indeed, there is of course a trade-off between the number of zones in which the paradigm is split on the one hand, and the coverage of the identified zones with respect to the whole lexicon on the other hand. In the stem-based mapping, the choice is not to make the number of zones too high, at the (minimal) cost of not accounting for a handful of irregular verbs. Conversely, in the word-based mapping that we adopt in the present paper, the higher number of zones is compensated by a complete coverage of the whole lexicon. Now, how many of the zones are actually identified and learned by speakers is an empirical matter that should be tackled by means of psycholinguistic experiments. However, what is important to keep in mind is that this gap between the two approaches can be filled, either by drawing the stem space in such a way that it covers also for irregular verbs, or by reducing the number of zones in the word-based analysis gradually collapsing zones of interpredictability for increasing values of implicative entropy. For instance, if the criterion for two cells to be assigned to the same zone is for them to be predictable from one another with an implicative entropy value lower than 0.01, rather than 0, then Z3,13,15 can be merged in a same zone. If the threshold is set at 0.02, also Z1 and Z9 can be conflated in the same zone, to which also Z7 can be added with threshold set at 0.03.

    23On the other hand, the discrepancy between the two approaches generated by more systematic, but unidirectional opacities such as the one described above in (ii) could be avoided if in the entropy-based mapping we decided that having null entropy in one direction would be a sufficient criterion for two cells to be assigned to the same zone – i.e., two cells belong to the same zone if either H(A|B) or H(B|A) = 0.

    5. Conclusions

    24In this paper, we have presented the inflected lexicon of Italian verbs LeFFI. We have then exploited it to investigate predictability in Italian verb inflection, using implicative entropy to estimate the uncertainty in predicting wordforms from one another. The results have been used to obtain a mapping of the paradigm in zones of interpredictability, that we have compared to the mapping of stems proposed in previous work, showing that our word-based procedure is capable of capturing aspects that are downplayed, if not ignored in the stem-based approach.

    25Besides their theoretical interest, both the resource and the information-theoretic approach potentially have more practical applications, for instance in the field of psycholinguistics. The resource provides a very clean but sufficiently large dataset of forms that can be used as a source of input for fine-grained experiments. In such experiments, it would be possible to test if the different levels of predictability between cells identified by different values of implicative entropy find a correspondence in the process of acquisition of inflectional morphology by L1 and L2 speakers – i.e., if the pairs of cells between which there are higher implicative entropy values are indeed the ones on which learners are more uncertain. More generally, our entropy-based evaluation of uncertainty in inflectional predictions can be considered as a measure of (at least one aspect of) morphological complexity, that can be used also in other areas, for instance to asses text readibility.

    6. Availability of Data and Tools

    26The data and tools used in this study are freely available online, allowing for an easy replication of the presented results. LeFFI can be found in the following repository: https://github.com/matteo-pellegrini/LeFFI. The Qumin toolkit that was used to automatically perform entropy computations can be freely downloaded at: https://github.com/XachaB/Qumin.

    Bibliographie

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    Goslin, Jeremy, Claudia Galluzzi, and Cristina Romani. “PhonItalia: A Phonological Lexicon for Italian”. Behavior Research Methods. Springer Science and Business Media LLC, October 4, 2013. doi:10.3758/s13428-013-0400-8.
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    Cabrio, Elena, Alessandro Mazzei, and Fabio Tamburini, eds. “Proceedings of the Fifth Italian Conference on Computational Linguistics CLiC-It 2018”. []. Accademia University Press, 2018. doi:10.4000/books.aaccademia.2802.
    Goslin, Jeremy, et al. “PhonItalia: A Phonological Lexicon for Italian”. Behavior Research Methods, vols. 46, nos. 3, Springer Science and Business Media LLC, 4 Oct. 2013, pp. 872-86. Crossref, https://doi.org/10.3758/s13428-013-0400-8.
    Montermini, Fabio, and Gilles Boyé. “Stem Relations and Inflection Class Assignment in Italian”. Word Structure, vols. 5, no. 1, Edinburgh University Press, Apr. 2012, pp. 69-87. Crossref, https://doi.org/10.3366/word.2012.0020.
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    Notes de bas de page

    1 Namely: andare ‘to go’, avere ‘to have’, dare ‘to give’, dire ‘to say’, essere ‘to be’, fare ‘to do’, sapere ‘to know’, and stare ‘to stay’.

    Auteurs

    • Matteo Pellegrini

      Liceo Statale “Augusto Monti” di Chieri, Italy – pellegrini.matteo@liceomonti.edu.it

    • Alessandra Teresa Cignarella

      Dipartimento di Informatica, Università degli Studi di Torino, Italy – PRHLT Research Center, Universitat Politècnica de València, Spain – cigna@di.unito.it

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    Pellegrini, M., & Cignarella, A. T. (2020). (Stem and Word) Predictability in Italian verb paradigms: An Entropy-Based Study Exploiting the New Resource LeFFI. In F. Dell’Orletta, J. Monti, & F. Tamburini (éds.), Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-it 2020. Torino: Accademia University Press. https://doi.org/10.4000/books.aaccademia.8830
    Pellegrini, Matteo, et Alessandra Teresa Cignarella. « (Stem and Word) Predictability in Italian Verb Paradigms: An Entropy-Based Study Exploiting the New Resource LeFFI ». In Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-It 2020, édité par Felice Dell’Orletta, Johanna Monti, et Fabio Tamburini. Torino: Accademia University Press, 2020. doi:10.4000/books.aaccademia.8830.
    Pellegrini, Matteo, et Alessandra Teresa Cignarella. « (Stem and Word) Predictability in Italian Verb Paradigms: An Entropy-Based Study Exploiting the New Resource LeFFI ». Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-It 2020, édité par Felice Dell’Orletta et al., Accademia University Press, 2020, https://doi.org/10.4000/books.aaccademia.8830.

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    Dell’Orletta, F., Monti, J., & Tamburini, F. (éds.). (2020). Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-it 2020. Torino: Accademia University Press. https://doi.org/10.4000/books.aaccademia.8203
    Dell’Orletta, Felice, Johanna Monti, et Fabio Tamburini, éd. Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-It 2020. Torino: Accademia University Press, 2020. doi:10.4000/books.aaccademia.8203.
    Dell’Orletta, Felice, et al., éditeurs. Proceedings of the Seventh Italian Conference on Computational Linguistics CLiC-It 2020. Accademia University Press, 2020, https://doi.org/10.4000/books.aaccademia.8203.
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