FBK: exploiting phrasal and contextual clues for negation scope detection

Authors:
Md. Faisal Mahbub Chowdhury
Affiliations:
Fondazione Bruno Kessler (FBK-irst), Trento, Italy and University of Trento, Italy
Venue:
SemEval '12 Proceedings of the First Joint Conference on Lexical and Computational Semantics - Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation
Year:
2012

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*SEM 2012 shared task: resolving the scope and focus of negation

SemEval '12 Proceedings of the First Joint Conference on Lexical and Computational Semantics - Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation

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Abstract

Automatic detection of negation cues along with their scope and corresponding negated events is an important task that could benefit other natural language processing (NLP) tasks such as extraction of factual information from text, sentiment analysis, etc. This paper presents a system for this task that exploits phrasal and contextual clues apart from various token specific features. The system was developed for the participation in the Task 1 (closed track) of the *SEM 2012 Shared Task (Resolving the Scope and Focus of Negation), where it is ranked 3rd among the participating teams while attaining the highest F1 score for negation cue detection.