28.5349, Calls: Computational Linguistics/USA

Wed Dec 20 04:23:13 UTC 2017

LINGUIST List: Vol-28-5349. Tue Dec 19 2017. ISSN: 1069 - 4875.

Subject: 28.5349, Calls: Computational Linguistics/USA

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Date: Tue, 19 Dec 2017 23:23:04
From: Yulia Grishina [grishina at uni-potsdam.de]
Subject: CRAC18 Shared Task

Full Title: CRAC18 Shared Task 

Date: 01-Jun-2018 - 06-Jun-2018
Location: New Orleans, Louisiana, USA 
Contact Person: Yulia Grishina
Meeting Email: grishina at uni-potsdam.de
Web Site: http://anawiki.essex.ac.uk/dali/crac18/crac18_shared_task.html 

Linguistic Field(s): Computational Linguistics 

Call Deadline: 01-Feb-2018 

Meeting Description:

Progress in anaphora resolution / coreference, as in other areas of NLP, is
achieved not only by creating larger corpora and by developing better
computational models for the task, but also by extending the range of issues
considered. The creation of the coreference portion of the OntoNotes corpus
(Pradhan et al, 2007) greatly boosted research in this area not only by making
available a much larger resource, but also by adopting a linguistically more
informed view of the task, and by extending the range of anaphoric phenomena
considered (Pradhan et al, 2011; Pradhan et al, 2012).

The CRAC 2018 shared task will exploit the availability of new resources, and
specifically, the second release of the ARRAU corpus (Uryupina et al, to
appear), that enables the study of aspects of anaphora not considered
previously, and in particular the phenomena of bridging references (Clark,
1975) and discourse deixis (a type of anaphoric reference to abstract objects)
(Webber, 1991), and covering spoken dialogue as well as text.

Call for Participation:

Progress in anaphora resolution / coreference, as in other areas of NLP, is
achieved not only by creating larger corpora and by developing better
computational models for the task, but also by extending the range of issues
considered. The creation of the coreference portion of the OntoNotes corpus
(Pradhan et al, 2007) greatly boosted research in this area not only by making
available a much larger resource, but also by adopting a linguistically more
informed view of the task, and by extending the range of anaphoric phenomena
considered (Pradhan et al, 2011; Pradhan et al, 2012).

The CRAC 2018 shared task will exploit the availability of new resources, and
specifically, the second release of the ARRAU corpus (Uryupina et al, to
appear), that enables the study of aspects of anaphora not considered
previously, and in particular the phenomena of bridging references (Clark,
1975) and discourse deixis (a type of anaphoric reference to abstract objects)
(Webber, 1991), and covering spoken dialogue as well as text. An example of
bridging reference is the handles in (1), which refers to a part of the egg
vases introduced in u1. (This example is from the GNOME corpus.) An example of
discourse deixis is This in (2), from (Webber, 1991).

1. (u1) These ''egg vases'' are of exceptional quality. 
    (u2) basketwork bases support egg-shaped bodies 
    (u3) and bundles of straw form the handles.

2.  For example, binocular stereo fusion is known to take place in a specific
area of the cortex near the back of the head. 
     Patients with damage to this area of the cortex have visual handicaps but
they show no obvious impairment in their ability to think. 
     This suggests that stereo fusion is not necessary for thought.

Shared Task Tracks:

The proposed shared task will be articulated around a number of sub-tasks, all
using the ARRAU corpus, and including the following:

- Task 1: Resolution of anaphoric identity 
This sub-task will be concerned with anaphoric identity only, but covering all
sub-domains of ARRAU: the RST domain (1/3 of the Penn Treebank), the TRAINS-93
domain (task-oriented dialogue), and the Pear Stories domain (spoken
narrative). 

- Task 2: Resolution of bridging references in text 
This subtask will be focused on bridging references, using the RST domain of
ARRAU. 

- Task 3: Resolution of discourse deixis 
This subtask will focus on discourse deixis only, using the RST domain of
ARRAU. 

Data:

The ARRAU corpus is distributed by LDC, that will make it available to the
participants to this shared task. Participants should register for the shared
task by email to Yulia Grishina (grishina at uni-potsdam.de) and Massimo Poesio
(m.poesio at qmul.ac.uk). After registering, participants should download the
Agreement form from the shared task website, sign it, and send it to LDC,
which will then release the data.

Important Dates:

12 December: Shared task description circulated and training data available
15 January: Test data distributed
1 February: System runs submitted
15 February: Results published
28 February: System description papers deadline
15 March: Task description paper deadline
20 March: Reviews for all papers

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