The Computational Linguistics Summarization Pilot task @ TAC 2014 Kokil Jaidka †, Muthu Kumar...

The Computational Linguistics Summarization Pilot task @ TAC

2014Kokil Jaidka†, Muthu Kumar Chandrasekaran* ‡, Min-Yen Kan* ‡, Ankur Khanna ‡

Nanyang Technological University †

Dept. of Computer Science, National University of Singapore *Web, IR / NLP Group ‡, National University of Singapore

Scientific Document Summarization

I have an abstract. I am done!

Photo Credits Dennis Jarvis @flickr

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Outline• Citation based extractive summaries• Facetted summaries• Automatic literature review• CL development corpus• Annotation• TAC 2015: CL-Summ track• Acknowledgements

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Scientific Document Summarization

• Abstracts– Authors’ own summary.

• Citation summary– Scientific community creates summaries of

research papers while they cite a paper but…

• Facetted summaries– Capture all aspects of a paper.

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Citation summary & facets

Image credits Ken Ammi @flickr

Structured Abstract:Common in Medicine, Biomed,Bioinformatics domains

Facetted summaries

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Facets & Argumentative zones

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Scientific Document SummarizationCitation based extractive summaries

Scope of Citation• Qazvinian, V., & Radev, D. R. “Identifying non-explicit citing

sentences for citation-based summarization” (ACL, 2010)

• Abu-Jbara, Amjad, and Dragomir Radev. "Reference scope identification in citing sentences.” (ACL, 2012)

Coherence• Abu-Jbara, Amjad, and Dragomir Radev. "Coherent citation-

based summarization of scientific papers.” (ACL 2011)

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Scientific Document Summarization & Automatic Literature Review

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Scientific Document Summarization & Automatic Literature Review

Free to access at: http://acl-arc.comp.nus.edu.sg/

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SciSumm Corpus• 10 reference papers or topics randomly

sampled from the ACL ARC corpus.• Upto 10 citing papers per reference paper

including those outside ACL ARC.

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Annotation pipeline

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AUTOMA

TIC SUMAUTOMA

TIC SUM

SCI DOC

SUMMSCI DOC

SUMM

<xml>

<abstract>

…….

</abstract>…

…

<xml>

<abstract>

…….

</abstract>…

…<xml>

<abstract>

…….

</abstract>…

…

<xml>

<abstract>

…….

</abstract>…

…

Annotation!

Post Processing to Biomedsumm format:

1.Scripts from U. Colorado (Prabha)

2.Sentence segmented version from U.Mich (Rahul)

OCR & section parse

OCR & section parse

ParsCit ‘s:SectLabel module

• 3 annotators in all.• Released data has one gold standard

annotation per topic or reference paper.• Discourse facet has a minor change from

Biomedsumm’s categories.

Annotating the SciSumm corpus

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• Task 1A: For each citance, identify the spans of text (cited text spans) in the RP that most accurately reflect the citance

Tasks

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Reference Paper (RP)Reference Paper (RP)

Citing papers.Citing text is called citance

Tasks• Task 1B: For each cited text span,

identify what facet of the paper it belongs to, from a predefined set of facets.

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Reference Paper (RP)Reference Paper (RP)

Mark the cited text in RP and provide its facet.

Citing papers.Citing text is called citance

Evaluation• Small corpus: 10 fold cross validated

evaluation over the 10 documents.• Task 1a scored by overlap with

citances.• Task 1b scored by overlap with

reference text spans.

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Task & evaluation: highlights

• First corpus in the CL that incorporates prior research findings on citation based summaries.

• 10 teams from 5 different countries participated in the evaluation.

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Limitations• No gold standard summaries yet

• OCR errors: We hope to have corrected them manually.

• But mainly, we need more annotated data!

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TAC 2015: CL-Summ shared task

• Plans to rollout a full-fledged official shared task for the CL corpus.

• 20 training topics

• 10 test topics

• 3 annotations per summary.

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TAC 2015: We need you help!

• We seek support from– summarization community in general and – CL community in particular

to provide manpower for annotating the corpus

• Great to have all participating teams contribute!

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Acknlowledgements• Hoa Dang, NIST

• Lucy Vanderwende, MSR

• All Biomedsumm track participants.

• This research is partially supported by CSIDM

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Questions? Thank you!