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    Plan détaillé Texte intégral 1 Introduction 2 Tasks and Challenge 3 Participation 4 Making Cross-task Shared Data 5 Towards Future Editions Bibliographie Notes de bas de page Auteurs

    EVALITA. Evaluation of NLP and Speech Tools for Italian

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    EVALITA 2016: Overview of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian

    Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti et Rachele Sprugnoli

    p. 7-10

    Texte intégral 1 Introduction 2 Tasks and Challenge 3 Participation 4 Making Cross-task Shared Data 5 Towards Future Editions Bibliographie Notes de bas de page Auteurs

    Texte intégral

    1 Introduction

    1EVALITA1 is the evaluation campaign of Natural Language Processing and Speech Tools for the Italian language. The aim of the campaign is to improve and support the development and dissemination of resources and technologies for Italian. Indeed, many shared tasks, covering the analysis of both written and spoken language at various levels of processing, have been proposed within EVALITA since its first edition in 2007. EVALITA is an initiative of the Italian Association for Computational Linguistics2 (AILC) and it is endorsed by the Italian Association of Speech Science3 (AISV) and by the NLP Special Interest Group of the Italian Association for Artificial Intelligence4 (AI*IA).

    2Following the success of the four previous editions, we organised EVALITA 2016 around a set of six shared tasks and an application challenge. In EVALITA 2016 several novelties were introduced on the basis of the outcome of two questionnaires and of the fruitful discussion that took place during the panel “Raising Interest and Collecting Suggestions on the EVALITA Evaluation Campaign” held in the context of the second Italian Computational Linguistics Conference (CLiC-it 2015) (Sprugnoli et al., 2016). Examples of these novelties are a greater involvement of industrial companies in the organisation of tasks, the introduction of a task and a challenge that are strongly application-oriented, and the creation of cross-task shared data. Also, a strong focus has been placed on using social media data, so as to promote the investigation into the portability and adaptation of existing tools, up to now mostly developed for the newswire domain.

    2 Tasks and Challenge

    3As in previous editions, both the tasks and the final workshop were collectively organised by several researchers from the community working on Italian language resources and technologies. At this year’s edition, the community organised six tasks and one additional challenge.

    4Standard Tasks Of the six tasks organised in the context of this year EVALITA, five dealt with different aspects of processing written language, with a specific focus on social media, and one on speech. A brief description of each task is given below.

    • ArtiPhon – Articulatory Phone Recognition. In this task, participants had to build a speaker-dependent phone recognition system that is to be evaluated on mismatched speech rates. While training data consists of read speech where the speaker was required to keep a constant speech rate, testing data range from slow and hyper-articulated speech to fast and hypo-articulated speech (Badino, 2016).

    • FactA – Event Factuality Annotation. In this task, the factuality profiling of events is represented by means of three attributes associated to event mentions, namely: certainty, time, and polarity. Participating systems were required to provide the values for these three attributes (Minard et al., 2016).

    • NEEL-it – Named Entity rEcognition and Linking in Italian Tweets. The task consists in automatically annotating each named entity mention (belonging to the following categories: Thing, Event, Character, Location, Organization, Person and Product) in a tweet by linking it to the DBpedia knowledge base (Basile et al., 2016).

    • PoSTWITA – POS tagging for Italian Social Media Texts. The task consists in Part-Of-Speech tagging tweets, rather than more standard texts, that are provided in their already tokenised form (Bosco et al., 2016).

    • QA4FAQ – Question Answering for Frequently Asked Questions. The goal of this task is to develop a system retrieving a list of relevant FAQs and corresponding answers related to a query issued by an user (Caputo et al., 2016).

    • SENTIPOLC – SENTIment POLarity Classification. The task consists in automatically annotating tweets with a tuple of boolean values indicating the messages subjectivity, its polarity (positive or negative), and whether it is ironic or not (Barbieri et al., 2016).

    5Application Challenge In addition to the more standard tasks described above, for the first time EVALITA included a challenge, organised by IBM Italy. The IBM Watson Services Challenge’s aim is to create the most innovative app on Bluemix services5, which leverages at least one Watson Service, with a specific focus on NLP and speech services for Italian (http://www.evalita.it/2016/tasks/ibm-challenge).

    3 Participation

    6The tasks and the challenge of EVALITA 2016 attracted the interest of a large number of researchers, for a total of 96 single registrations. Overall, 34 teams composed of more than 60 individual participants from 10 different countries6 submitted their results to one or more different tasks of the campaign.

    7A breakdown of the figures per task is shown in Table 1. With respect to the 2014 edition, we collected a significantly higher number of registrations (96 registrations vs 55 registrations collected in 2014), which can be interpreted as a signal that we succeeded in reaching a wider audience of researchers interested in participating in the campaign. This result could be also be positively affected by the novelties introduced this year to improve the dissemination of information on EVALITA, e.g. the use of social media such as Twitter and Facebook. Also the number of teams that actually submitted their runs increased in 2016 (34 teams vs 23 teams participating in the 2014 edition), even if we reported a substantial gap between the number of actual participants and those who registered.

    Table 1: Registered and actual participants

    task

    registered

    actual

    ARTIPHON

    6

    1

    FactA

    13

    0

    NEEL-IT

    16

    5

    QA4FAQ

    13

    3

    PoSTWITA

    18

    9

    SENTIPOLC

    24

    13

    IBM Challenge

    6

    3

    total

    96

    34

    8In order to better investigate this issue and gather some insights on the reasons of the significant drop in the number of participants w.r.t. the registrations collected, we ran an online questionnaire specifically designed for those who did not submit any run to the task to which they were registered. In two weeks we collected 14 responses which show that the main obstacles to the actual participation in a task were related to personal issues (“I had an unexpected personal or professional problem outside EVALITA” or “I underestimated the effort needed”) or personal choices (“I gave priority to other EVALITA tasks”). As for this last point, NEEL-it and SENTIPOLC were preferred to FactA, which did not have any participant. Another problem mentioned by some of the respondents is that the evaluation period was too short: this issue is highlighted mostly by those who registered to more than one task.

    4 Making Cross-task Shared Data

    9As an innovation at this year’s edition, we aimed at creating datasets that would be shared across tasks so as to provide the community with multi-layered annotated data to test end-to-end systems. In this sense, we encouraged task organisers to annotate the same instances, each task with their respective layer. The involved tasks were: SENTIPOLC, PoSTWITA, NEEL-it and FactA.

    10The testsets for all four tasks comprise exactly the same 301 tweets, although Sentipolc has a larger test-set of 2000 tweets, and FactA has an additional non-social media testset of 597 newswire sentences. Moreover, the training sets of PoSTWITA and NEEL-it are almost entirely subsets of SENTIPOLC. 989 tweets from the 1000 that make NEEL-it’s training set are in SENTIPOLC, and 6412 of PoSTWITA (out of 6419) also are included in the SENTIPOLC training set.

    11The matrix in Table 2 shows both the total number of test instances per task (diagonally) as well as the number of overlapping instances for each task pair. Please note that while SENTIPOLC, NEEL-it, and PoSTWITA provided training and test sets made up entirely of tweets, FactA included tweets only in one of their test set, as a pilot task. FactA’s training and standard test sets are composed of newswire data, which we report in terms of number of sentences (Minard et al., 2016). For this reason the number of instances in Table 2 is broken down for FactA’s test set: 597 newswire sentences and 301 tweets, the latter being the same as the other tasks.

    Table 2: Overview of cross-task shared data. Number of tweets are reported. When the figure is marked with a *, it is instead the number of sentences from newswire documents.

    TRAIN

    SENTIPOLC

    NEEL-it

    PoSTWITA

    FactA

    SENTIPOLC

    7410

    989

    6412

    0

    NEEL-it

    989

    1000

    0

    0

    PoSTWITA

    6412

    0

    6419

    0

    FactA

    0

    0

    0

    2723*

    TEST

    SENTIPOLC

    NEEL-it

    PoSTWITA

    FactA

    SENTIPOLC

    2000

    301

    301

    301

    NEEL-it

    301

    301

    301

    301

    PoSTWITA

    301

    301

    301

    301

    FactA

    301

    301

    301

    597*+301

    5 Towards Future Editions

    12On the basis of this edition’s experience, we would like to conclude with a couple of observations that prospective organisers might find useful when designing future editions.

    13Many novelties introduced in EVALITA 2016 proved to be fruitful in terms of cooperation between academic institutions and industrial companies, balance between research and applications, quantity and quality of annotated data provided to the community. In particular, the involvement of representatives from companies in the organisation of tasks, the development of shared data, the presence of applicationoriented tasks and challenge are all elements that could be easily proposed also in future EVALITA editions.

    14Other innovations can be envisaged for the next campaign. For example, in order to help those who want to participate in more than one task, different evaluation windows for different tasks could be planned instead of having the same evaluation deadlines for all. Such kind of flexibility could foster the participation of teams to multiple tasks, but the fact that it impacts on the work load of the EVALITA’s organizers should not be underestimated. Moreover, social media texts turned out to be a very attractive domain but others could be explored as well. For instance, Humanities resulted as one of the most appealing domains in the questionnaires for industrial companies and former participants and other countries are organising evaluation exercises on it (see, for example, the Translating Historical Text shared task at CLIN 277).

    Bibliographie

    Leonardo Badino. 2016. The ArtiPhon Challenge at Evalita 2016. In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Francesco Barbieri, Valerio Basile, Danilo Croce, Malvina Nissim, Nicole Novielli, and Viviana Patti. 2016. Overview of the EVALITA 2016 SENTiment POLarity Classification Task. In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Pierpaolo Basile, Annalina Caputo, Anna Lisa Gentile, and Giuseppe Rizzo. 2016. Overview of the EVALITA 2016 Named Entity rEcognition and Linking in Italian Tweets (NEEL-IT) Task. In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Cristina Bosco, Fabio Tamburini, Andrea Bolioli, and Alessandro Mazzei. 2016. Overview of the EVALITA 2016 Part Of Speech on TWitter for ITAlian Task. In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Annalina Caputo, Marco de Gemmis, Pasquale Lops, Franco Lovecchio, and Vito Manzari. 2016. Overview of the EVALITA 2016 Question Answering for Frequently Asked Questions (QA4FAQ) Task. In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Anne-Lyse Minard, Manuela Speranza, and Tommaso Caselli. 2016. The EVALITA 2016 Event Factuality Annotation Task (FactA). In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Rachele Sprugnoli, Viviana Patti, and Franco Cutugno. 2016. Raising Interest and Collecting Suggestions on the EVALITA Evaluation Campaign. In Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, and Rachele Sprugnoli, editors, Proceedings of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA 2016). aAcademia University Press.

    Notes de bas de page

    1 http://www.evalita.it

    2 http://www.ai-lc.it/

    3 http://www.aisv.it/

    4 http://www.aixia.it/

    5 https://console.ng.bluemix.net/catalog/

    6 Brazil, France, Germany, India, Ireland, Italy, Mexico, The Netherlands, Spain, Switzerland.

    7 http://www.ccl.kuleuven.be/CLIN27/

    Auteurs

    • Pierpaolo Basile

      University of Bari Via E.Orabona, 4, 70126 Bari, Italy - basilepp@di.uniba.it

    • Franco Cutugno

      University Federico II Via Claudio 21, 80126 Naples, Italy - cutugno@unina.it

    • Malvina Nissim

      University of Groningen Oude Kijk in t Jatstraat 26 9700 AS Groningen, NL - m.nissim@rug.nl

    • Viviana Patti

      University of Turin c.so Svizzera 185, I-10149 Torino, Italy - patti@di.unito.it

    • Rachele Sprugnoli

      FBK and University of Trento Via Sommarive, 38123 Trento, Italy - sprugnoli@fbk.eu

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    1 http://www.evalita.it

    2 http://www.ai-lc.it/

    3 http://www.aisv.it/

    4 http://www.aixia.it/

    5 https://console.ng.bluemix.net/catalog/

    6 Brazil, France, Germany, India, Ireland, Italy, Mexico, The Netherlands, Spain, Switzerland.

    7 http://www.ccl.kuleuven.be/CLIN27/

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    • Basile, Valerio. Novielli, Nicole. Croce, Danilo. Barbieri, Francesco. Nissim, Malvina. Patti, Viviana. (2021) Sentiment Polarity Classification at EVALITA: Lessons Learned and Open Challenges. IEEE Transactions on Affective Computing, 12. DOI: 10.1109/TAFFC.2018.2884015
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    Basile, P., Cutugno, F., Nissim, M., Patti, V., & Sprugnoli, R. (2016). EVALITA 2016: Overview of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian. In P. Basile, F. Cutugno, M. Nissim, V. Patti, & R. Sprugnoli (éds.), EVALITA. Evaluation of NLP and Speech Tools for Italian (1‑). Accademia University Press. https://doi.org/10.4000/books.aaccademia.1924
    Basile, Pierpaolo, Franco Cutugno, Malvina Nissim, Viviana Patti, et Rachele Sprugnoli. « EVALITA 2016: Overview of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian ». In EVALITA. Evaluation of NLP and Speech Tools for Italian, édité par Pierpaolo Basile, Franco Cutugno, Malvina Nissim, Viviana Patti, et Rachele Sprugnoli. Torino: Accademia University Press, 2016. https://doi.org/10.4000/books.aaccademia.1924.
    Basile, Pierpaolo, et al. « EVALITA 2016: Overview of the 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian ». EVALITA. Evaluation of NLP and Speech Tools for Italian, édité par Pierpaolo Basile et al., Accademia University Press, 2016, https://doi.org/10.4000/books.aaccademia.1924.

    Référence numérique du livre

    Format

    Basile, P., Cutugno, F., Nissim, M., Patti, V., & Sprugnoli, R. (éds.). (2016). EVALITA. Evaluation of NLP and Speech Tools for Italian (1‑). Accademia University Press. https://doi.org/10.4000/books.aaccademia.1899
    Basile, Pierpaolo, Franco Cutugno, Malvina Nissim, Viviana Patti, et Rachele Sprugnoli, éd. EVALITA. Evaluation of NLP and Speech Tools for Italian. Torino: Accademia University Press, 2016. https://doi.org/10.4000/books.aaccademia.1899.
    Basile, Pierpaolo, et al., éditeurs. EVALITA. Evaluation of NLP and Speech Tools for Italian. Accademia University Press, 2016, https://doi.org/10.4000/books.aaccademia.1899.
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