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

 | 
Felice Dell'Orletta
, 
Johanna Monti
, 
Fabio Tamburini

Contributed Papers

Tracing Metonymic Relations in T-PAS: An Annotation Exercise on a Corpus-based Resource for Italian

Emma Romani et Elisabetta Jezek

Résumé

In this paper we address the main issues and results of a research thesis (Romani, 2020) dedicated to the annotation of metonymies in T-PAS, a corpus-based digital repository of Italian verbal patterns (Ježek et al., 2014). The annotation was performed on the corpus instances of a selected list of 30 verbs and was aimed at both implementing the resource with metonymic patterns and identifying and creating a map of the metonymic relations that occur in the verbal patterns. The annotated corpus data (consisting of 1218 corpus instances), the patterns, and the relations can be useful for NLP tasks such as metonymy recognition.1

Texte intégral

1. Introduction

1Metonymy is a language phenomenon for which one referent is used to denote another referent associated with it (Lakoff & Johnson, 1980; Fauconnier, 1985; Ježek, 2016). For example, in the sentence ‘he drank a glass at the pub’, glass (the metonymic or source type denoting a container) refers to its content (the target type, a beverage). In our research, we investigated metonymy from a corpus-based perspective, through the analysis of corpus data and the annotation performed in T-PAS, a corpus-based resource for Italian verbs. T-PAS consists of a repository of typed predicate argument structures (Ježek et al., 2014), i.e. verbal patterns together with semantically-specified arguments, linked to manually annotated corpus instances (see Section 3.1). An example of a pattern (or t-pas) for the verb bere ‘to drink’ is reported in Figure 1:where [Animate] and [Beverage] are the semantic types specifying the subject and object positions.

Figure 1

Figure 1

Pattern 1 of the verb bere (‘to drink’) in T-PAS together with its sense description

2The annotation of metonymies was performed on the corpus instances of a list of 30 verbs contained in T-PAS (taken from Ježek & Quochi, 2010). As emerged from this background study, the semantic properties of those verbs were likely to convey metonymies in their argument structures. Starting from this list, our work was intended as an implementation of the resource; specifically, we annotated metonymic corpus instances and created metonymic sub-patterns linked to them.

3The research had several aims. First, we were interested in studying qualitatively the phenomenon in and through the corpus instances and in implementing the annotation tool of the resource with a specific feature that allowed us to encode metonymic arguments in the verbal patterns. For the latter purpose, we collaborated with the Faculty of Informatics at Masaryk University of Brno (CZ): they gave us the technical support for the implementation of the annotation tool.

4Second, our intention was to conceive a general theoretical framework to represent the metonymies found through the qualitative corpus analysis, by designing a map of metonymies and by drafting a list of the metonymic relations that occur in the verbal patterns (see Section 4).

5The paper is organized as follows. In Section 2 we present related studies. In Section 3 we describe the methodology we followed in annotating the corpus instances for metonymies, together with a brief introduction to T-PAS. In Section 4 we present the results of our annotation: a generalization of the metonymic relations found, and a map which visually highlights the semantic and cognitive connections between the semantic types. Further developments of the project are described in Section 5; our intention is to enrich the number of analysed verbs and eventually add new types of metonymic relations.

2. Related works

6Corpus-based studies on metonymy are often intended for NLP tasks. Markert & Nissim (2006), provide a corpus-based annotation scheme for metonymies with the aim of improving automatic metonymy recognition and resolution. Related to it, Markert and Nissim (2007) present the results of a supervised task on metonymy resolution; an analogous task has been addressed by Pustejovsky et al. (2010) within the scope of SemEval-2010. A recent study elaborated a computational model based on the dataset of Pustejovsky et al. (2010) for the detection of metonymies (McGregor et al., 2017).

7Corpus-based studies on metonymies do not necessarily address NLP tasks. An attempt to implement corpus-based resources to display metonymies is described in Ježek & Frontini (2010). Also, Pustejovsky & Ježek (2008) present a corpus investigation aimed at identifying metonymic mechanisms in predicate-argument constructions from a theoretical perspective. Finally, Marini & Ježek (2020) performed an equivalent corpus-based metonymy annotation on a sample of 101 Croatian verbs within the scope of CROATPAS (Marini & Ježek, 2019), sister project of T-PAS.

3. Resource and methodology

3.1 The resource: T-PAS

8T-PAS is the corpus-based resource used in this research. It consists of a repository of Typed Predicate Argument Structures (T-PAS) (Ježek et al., 2014) for Italian verbs. The resource consists of three components:

  1. a repository of corpus-derived predicate argument structures for verbs with semantic specification of the arguments, linked to lexical units (verbs);

  2. an inventory of about 200 corpus-derived semantic classes for nouns, relevant for the disambiguation of the verb in context;

    • 2 The corpus is a reduced and cleaned version of ItWaC (Baroni et al., 2009), a corpus of Italian tex (...)

    a corpus2 of sentences that instantiate T-PAS, tagged with lexical unit (verb) and pattern number.

  • 3 Semantic Types are expressed through square brackets (e.g. [Animate], [Beverage]) and are organized (...)

9Typed predicate argument structures (or t-pass) are patterns which display the syntactic and semantic properties of verbs: for each meaning of a verb a specific t-pas is provided. Verb sense is determined by the arguments it combines with (subject, object, etc.), which are defined through a specific Semantic Type.3

10T-pass are corpus-derived: patterns were acquired through the manual clustering and annotation of corpus instances for each verb following the CPA procedure (Hanks, 2013). Each t-pas in the resource is labelled with a number and connected to a list of corpus instances, realizing the specific verb meaning. Each pattern is associated with a sense description, a brief definition of the meaning of the verb (see the second line in Figure 1). Each pattern can have sub-patterns created by annotators, for corpus instances that do not reflect the prototypical semantic behaviour of the verb or of its arguments, as in metonymic uses. Like their patterns, sub-patterns are connected to annotated instances from the corpus. In our work, we implemented the annotation tool by adding a new label (‘.m’), which we used to annotate metonymic uses in sub-patterns (see Figure 2).

Figure 2

Figure 2

Metonymic sub-pattern for t-pas 1 of the verb bere (‘to drink’) in T-PAS

3.2 Methodology

11We conceived an empirical methodology in order to get significant results from the corpus analysis: we manually extracted significant instances from the corpus and annotated them as metonymic instances under their specific pattern. In order to annotate the instances, we exploited the Sketch Engine functions available for analysing the corpus. The annotation scheme can be summarized as follows:

  1. Random sampling of about 200 corpus instances for each of the 30 verbs (the sample allowed to reduce the time spent in skimming the instances, still providing a balanced overview of the kind of instances contained in the corpus);

  2. Manual annotation of the metonymic instances through the sublabel (signalled with “.m”);

  3. Implementation of the sub-pattern in the resource by adding metonymic semantic types (see 1.m in Figure 1);

  4. Definition of the metonymic relation (see Table 2) between the source and the target semantic type (e.g. [Container] ‘contains’ [Beverage]), with its encoding in the sense description, translated in Italian (see Figure 2).

Table 1

verbs

n. of annotated

instances

verbs

n. of annotated

instances

verbs

n. of annotated

instances

accusare

34

concludere

39

parcheggiare

19

annunciare

40

contattare

27

raggiungere

51

arrivare

47

continuare

21

recarsi

81

ascoltare

103

divorare

0

rimbombare

28

atterrare

76

echeggiare

24

sentire

27

avvisare

22

finire

66

sorseggiare

32

bere

93

informare

16

udire

35

chiamare

16

interrompere

39

venire

63

cominciare

19

leggere

84

versare

12

completare

42

organizzare

13

visitare

49

List of the Italian verbs with number of annotated instances in ItWaC corpus

  • 4 In some cases, additional instances were included, if the number of metonymic instances provided by (...)

12In Table 1, we show the number of instances annotated for each of the 30 verbs. Overall, the dataset consists of 1218 annotated instances. The number of instances from the random sample can vary from a verb to another, because verbs have different frequencies in the corpus and metonymic phenomena can be more or less pervasive according to the verb under examination. Some cases (e.g. divorare – ‘to devour’ – in Table 1) did not provide any metonymic instance at all (for an explanation and further discussion on this point, see Romani, 2020).4

13The annotation procedure was conducted manually by one single annotator (the first author) and, so far, it was not possible to evaluate our annotation procedure as we focused on the qualitative analysis and the retrieval of the relations: it is our intent for the future, as it is essential for further progresses in the research.

14Currently, the adopted annotation scheme did not provide ambiguous cases, as metonymies were usually clear-cut and the shift of referent from the source to the target semantic type easily identifiable. This may differ from metaphors, for example, where the shift between literal and non-literal meaning may be perceived as more gradual. However, further investigation needs to be done through the annotation of a higher number of instances (expanding the list of verbs) and the comparison and the evaluation of the annotation results of more than one annotator.

4. Results

15The overall aim of the research was to give a theoretical account of the metonymic relations found through the corpus analysis and pattern annotation. Therefore, the main results of the study are a list of metonymic relations between the target and the metonymic (source) semantic type (Table 2, Appendix) and a map where the target semantic types are connected to the metonymic types, and the relation between the two is expressed (Figure 3).

  • 5 Highlighted in bold are the metonymic semantic types that are also target types (for example, [Soun (...)

16The second column in Table 2 (Appendix) reports the 37 relations we identified and encoded (the relations are grouped according to their target type, following this order: [Human], [Location], [Document], [Beverage], [Vehicle], [Sound]). The relation is a short description that illustrates how the metonymic semantic type is connected to the target semantic type; for example (see the highlighted line of the table), [Container] is the metonymic semantic type (first column) and ‘contains’ is the relation (second column) which links [Container] to the target semantic type [Beverage] (third column).5 An instance for this is: ‘we went out to drink a glass’ (glass ‘contains’ something to drink). The fourth column contains an instance in Italian from ItWaC reduced corpus, for each relation found. For each instance, the metonymic argument (exemplifying the source-metonymic semantic type) is highlighted in bold, and the verb triggering the metonymy is in italics.

17As a second step, we attempted to draw a map of the metonymic relations, by connecting the target semantic types to their metonymic arguments. In Figure 3, each target semantic type is at the centre of a circular area (target type area), highlighted in bold; in each area the metonymic types related to the target semantic type are included; for each target semantic type, a different colour is given. In most of the cases, they intersect with each other, showing how semantic types can refer to different areas. For example, [Sound] and [Human] share various semantic types (e.g. [Machine], [Musical Instrument], [Medium], as visible in Figure 3) as they can be used both to refer to [Sound] and to [Human] (for clarifying examples, see Table 2 in the Appendix). As mentioned, we included metonymic semantic types in the areas of the map. In our representation, metonymic and target semantic types are connected to each other through arrows, on which the relation is notated. The direction of the arrow traces the direction of the metonymic shift: from the metonymic semantic type to the target semantic type (e.g., [Container] [Beverage]).

Figure 3

Figure 3

Map of metonymic relations between source and target semantic types, linked by an arrow

18Our results show that metonymic semantic types are fluid; target types can also be metonymic types, in certain contexts, as previously mentioned. For example, [Human] is the target type for [Document] (as [Document] is written or composed by [Human] as an author; e.g. ‘this book tells about II World War’) but also [Document] is the target type for [Human] (as [Human] writes or composes [Document]; e.g. ‘I am reading Shakespeare’).

19The structure of the map we conceived draws attention to two main aspects. First, it depicts the complexity of the metonymic relations between semantic types and highlights how metonymy is not a unidirectional phenomenon but, conversely, it is fluid and changeable. Second, from a cognitive point of view, [Human] is at the centre of most of the relations and each target type area is connected to it by multiple relations. In particular, in our data, [Human] is deeply connected and involved within the [Sound] area (for more details, see Romani, 2020).

20Finally, for what concerns the limited sample of verbs under investigation, it is interesting to notice that even if there are various source types, the potential target semantic types are only six. We may argue that there is a limited number of target types that attract different source types, in particular regarding [Human] and [Sound], which have the highest number of relations (see Table 2). Further investigation on this point is necessary, together with the extension of the number of examined verbs and instances.

5. Conclusions and future works

21In this paper, we approached the study of metonymy from a corpus-based perspective. The research was conducted on a selected list of verbs, taken from a background study (Ježek & Quochi, 2010). Our aim was to search for metonymic phenomena inside a corpus of Italian language and to register them in a resource for Italian verbs, T-PAS. To do so, we conceived an annotation scheme and procedure that gave us relevant results and allowed us to register a variety of metonymic relations.

22We also attempted to make some theoretical generalizations based on the metonymic relations we found through the corpus analysis. We therefore created a list of metonymic relations and we designed a map in which the relations are connected to the semantic types they involve. Both the map and the list depict the complexity and variety of the phenomenon, in terms of number of possible metonymic relations and of the semantic types interested.

23In future perspectives, we intend to enrich the map and the list with new relations by extending the number of verbs investigated and to evaluate the annotation procedure. For future annotations, we will provide the current version of the list and of the map on the online public version of T-PAS (upcoming). We are also interested in comparing our results with those in Marini & Ježek (2020), in a cross-linguistic perspective.

24In line with previous studies (Section 2), we believe that the annotated corpus data, as well as the relations in Table 2, could be useful for automatic detection of metonymies. To our knowledge, little work has been done on this for Italian language: it would be therefore intriguing to test our data in NLP tasks.

Bibliographie

M. Baroni, Bernardini, S., Ferraresi, A. & Zanchetta, E. (2009). The wacky wide web: a collection of very large linguistically processed web-crawled corpora. Language resources and evaluation, 43(3):209–226.

G. Fauconnier. (1985). Mental Spaces. Cambridge, USA: MIT Press.

P. Hanks. (2013). Lexical Analysis: Norms and Exploitations. Cambridge: The MIT Press.

E. Ježek. (2016). The Lexicon: An Introduction. Oxford: Oxford University Press.

E. Ježek. (2019). Sweetening Ontologies Cont’d: Aligning bottom-up with top-down ontologies. In Barton, A., Seppälä, S. & Porello, D. (eds.), Proceedings of the Joint Ontology Workshops 2019. Graz, Austria.

E. Ježek, Magnini, B., Feltracco, A., Bianchini, A. & Popescu, O. (2014). T-PAS: A resource of corpus-derived Types Predicate-Argument Structures for linguistic analysis and semantic processing. In Proceedings of LREC, 890-895.

E. Ježek & Frontini, F. (2010). From Pattern Dictionary to PatternBank. In de Schryver G.M. (ed.), A Way with Words: Recent Advances in Lexical Theory and Analysis. Menha Publishers, Kampala. 215-239.

E. Ježek & Quochi, V. (2010). Capturing Coercions in Texts: A First Annotation Exercise. In Proceedings of the 7th International Conference on Language Resources and Evaluation. La Valletta, Malta. (LREC-2010), 1464-1471.

A. Kilgarriff, Baisa, V., Bušta, J., Jakubíček, M., Kovář, V., Michelfeit, J., Rychlý, P. & Suchomel, V. (2014). The Sketch Engine: ten years on. Lexicography, 1(1), 7-36.

G. Lakoff & Johnson, M. (1980). Metaphors we Live By. Chicago, USA: University of Chicago Press.

C. Marini & Ježek, E. (2019). CROATPAS: A Resource of Corpus-derived Typed Predicate Argument Structures for Croatian. In Proceedings of the 6th Italian Conference on Computational Linguistics (CLiC-it). Bari, Italy.

C. Marini & Ježek, E. (2020). Annotating Croatian Semantic Type Coercions in CROATPAS. In Proceedings of the 16th Joint ACL-ISO Workshop Interoperable Semantic Annotation (ISA-16), pages 49–58. Language Resources and Evaluation Conference (LREC 2020), Marseille, May 2020.

K. Markert & Nissim, M. (2006). Metonymic Proper Names: A Corpus-Based Account. In Gries, S.T. & Stefanoewitsch, A. (eds.), Corpora in Cognitive Linguistics. Vol. 1: Metaphor and Metonymy. Mouton-De Gruyter: Berlin & New York.

K. Markert & Nissim, M. (2007, June). Semeval-2007 task 08: Metonymy resolution at semeval-2007. In Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007) (pp. 36-41).

S. McGregor, Ježek, E., Purver M. & Wiggings G. (2017). A Geometric Model for Detecting Semantic Coercion. In Gardent, C. and C. Retoré (eds) Proceedings of the 12th International Workshop on Computational Semantics (IWCS), ACL Anthology, Association for Computational Linguistics, pp. 1-14.

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E. Romani. (2020). Searching for Metonymies in Natural Language Texts. A Corpus-based Study on a Resource for Italian Verbs. BA Thesis, University of Pavia, Pavia, Italy.

Annexes

 

 

metonymic (source)

semantic type

relation

target

semantic type

corpus example (ItWaC reduced)

[Vehicle]

is driven by

[Human]

L'agente scese velocemente in strada, chiamò un taxi e dette l'indirizzo segreto.

[Document]

is written, composed by

[Human]

Il gioco, informa un comunicato, sarà lanciato contemporaneamente in Italia e Regno Unito.

[Location]

is represented, governed by

[Human]

Dissidenti e rifugiati accusano la Corea del Nord di tortura politica e […] chiedono di includere nei colloqui anche il tema dei diritti umani e delle libertà fondamentali.

[Sound]

is produced, emitted by

[Human]

A questo punto una voce interrompe Gesù.

[Event]

is determined by

[Human]

Ricordo la telefonata che mi raggiunse la mattina presto nella mia abitazione di Milano, la corsa in ufficio, il viaggio dell' indomani nei luoghi della catastrofe […]

[Projectile]

is shot by

[Human]

L' uomo viene raggiunto da cinque proiettili e muore mentre viene trasportato in ospedale.

[Sound Maker]

is activated by

[Human]

Una campana annuncia l'inizio della messa.

[Machine]

is activated by

[Human]

L'altoparlante annunciava l'arrivo di un treno.

[Musical

Instrument]

is played by

[Human]

Oltre al Flauto d'oro, lo zufolo pastorale annuncia ed accompagna Papageno.

[Concept]

is expressed by

[Human]

Alcuni studiosi accusavano la psicologia di naturalismo, altri di non essere una scienza naturale.

[Number]

is associated to

[Human]

L'iniziativa consiste nella possibilità per gli anziani di contattare un numero messo a disposizione gratuitamente dal Comune, […] che attiverà uno degli oltre mille volontari.

[Part of

Language]

is pronounced by

[Human]

 La frase venne interrotta dal suono di sirene, quelle della Polizia. 

[Event]

is held in

[Location]

Una sera, mentre si sta recando ad una cena dove dovrà tenere un discorso, Henry riceve l'invito a presentarsi al commissariato.

[Institution]

is located in

[Location]

Giovanni Paolo II ha visitato il Parlamento italiano, su invito dei Presidenti della Camera dei Deputati.

[Artwork]

is shown in

[Location]

[…] raggiungiamo piazza Pio IX dove sorge la Pinacoteca Ambrosiana, entriamo per visitare le opere di Caravaggio, Leonardo e Botticelli.

[Artifact]

is in

[Location]

La mia peste la sento tre volte al giorno, anche se non vuole venire al telefono a parlarmi […]

[Human]

writes, composes

[Document]

Ho letto Dante, Moravia, Calvino.

[Information]

is contained in

[Document]

Vi raccomandiamo, prima di procedere nella consultazione, di leggere le avvertenze.

[Event]

is contained in

[Document]

Consiglio di leggere senza paraocchi ideologici questa intervista del prof. Dallapiccola sulla diagnosi preimpianto.

[Container]

contains

[[Beverage]

Al pub Orange Paolo aveva bevuto un bicchiere di troppo e alcuni clienti […] hanno chiesto l'intervento dei carabinieri perché venisse allontanato.

[Quantity]

is a portion of

[Beverage]

Occorre portarsi le sedie e il fuoco, e mettere ciascuno due soldi, se si vuole bere un goccio.

[Business

Enterprise]

produces

[Beverage]

Anche noi della Nazionale beviamo Uliveto!

[Human]

drives or travels on

[Vehicle]

Il presidente del Consiglio è atterrato a mezzogiorno sul campo sportivo di Sant'Agnello a Sorrento.

[Fantasy

Character]

drives or travels on

[Vehicle]

Una coppia di alieni atterra sulla Terra, precisamente in una campagna.

[Event]

happens through

[Vehicle]

Alle 16:50 è atterrato il volo speciale Parigi-Beirut della linea di bandiera libanese.

[Machine]

activated by [Human], produces

[Sound]

Ma molti non hanno voluto ascoltare la sirena d' allarme e sono rimasti nelle loro abitazioni […]

[Weapon]

activated by [Human], produces

[Sound]

fucili echeggiano in lontananza mentre tutto intorno continua a muoversi e girare.

[Sound

Maker]

activated by [Human], produces

[Sound]

Le campane non risuoneranno i rintocchi della morte, ma echeggeranno a festa per celebrare la Vita.

[Musical

Instrument]

played by [Human], produces

[Sound]

Le trombe non si udivano più, ma dalla parte della vallata si udivano ad intervalli dei lontani fragori.

[Human]

produces, emits

[Sound]

Se io fossi una persona che non ha mai ascoltato Patty Smith […] magari mi passerebbe anche la voglia di andarla a scoprire. 

[Weather Event]

produces

[Sound]

Ascolta la pioggia, se hai sonno ti tengo con me. 

[Part of

Language]

pronounced by [Human], produces

[Sound]

Avete ascoltato tutti le parole di Romano: sono sicuro che tanti tra noi pensano che le sue idee siano una buona base per governare il Paese.

[Narrative]

told by [Human] through [Part of Language], produces

[Sound]

Per ascoltare un racconto, una storia, occorre restare in silenzio.

[Speech Act]

told by [Human] through [Part of Language], produces

[Sound]

Low Key udì a stento la domanda di Eric mentre tornava a concentrarsi sul presente.

[Event]

involves

[Sound]

 In una grotta dedicata alla Madonna di Lourdes è possibile, oltre che ascoltare la Santa Messa la domenica, celebrare matrimoni […]

[Medium]

produces

[Sound]

Roberto Landi sta seduto dentro il camper e ascolta la televisione

[TV Program]

emits

[Sound]

L'autista stava ascoltando un notiziario della Bbc su quanto è accaduto qualche giorno fa a Madaen.

 

Notes

1 Copyright ©️2020 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).

2 The corpus is a reduced and cleaned version of ItWaC (Baroni et al., 2009), a corpus of Italian texts, available in the Sketch Engine tool (Kilgarriff et al., 2014).

3 Semantic Types are expressed through square brackets (e.g. [Animate], [Beverage]) and are organized in a hierarchy, called the System of Semantic Types (see Ježek, 2019 for a more detailed account).

4 In some cases, additional instances were included, if the number of metonymic instances provided by the sample was not sufficient to exemplify a specific relation. Instances with arguments and semantic types analogous to the ones already tagged were selected. To do so, we exploited other Sketch Engine functions (see Romani, 2020 for further details).

5 Highlighted in bold are the metonymic semantic types that are also target types (for example, [Sound] is the metonymic semantic type in “[Sound] is emitted by [Human]”, but also the target semantic type in “[Medium] produces [Sound]”).

Table des illustrations

Titre Figure 1
Légende Pattern 1 of the verb bere (‘to drink’) in T-PAS together with its sense description
URL http://books.openedition.org/aaccademia/docannexe/image/8870/img-1.jpg
Fichier image/jpeg, 48k
Titre Figure 2
Légende Metonymic sub-pattern for t-pas 1 of the verb bere (‘to drink’) in T-PAS
URL http://books.openedition.org/aaccademia/docannexe/image/8870/img-2.jpg
Fichier image/jpeg, 106k
Titre Figure 3
Légende Map of metonymic relations between source and target semantic types, linked by an arrow
URL http://books.openedition.org/aaccademia/docannexe/image/8870/img-3.jpg
Fichier image/jpeg, 159k

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