Extracting opinion expressions and their polarities - Exploration of pipelines and joint models

Richard Johansson, Alessandro Moschitti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

24 Citations (Scopus)

Abstract

We investigate systems that identify opinion expressions and assigns polarities to the extracted expressions. In particular, we demonstrate the benefit of integrating opinion extraction and polarity classification into a joint model using features reflecting the global polarity structure. The model is trained using large-margin structured prediction methods. The system is evaluated on the MPQA opinion corpus, where we compare it to the only previously published end-to-end system for opinion expression extraction and polarity classification. The results show an improvement of between 10 and 15 absolute points in F-measure.

Original languageEnglish
Title of host publicationACL-HLT 2011 - Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies
Pages101-106
Number of pages6
Volume2
Publication statusPublished - 1 Dec 2011
Externally publishedYes
Event49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies, ACL-HLT 2011 - Portland, OR, United States
Duration: 19 Jun 201124 Jun 2011

Other

Other49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies, ACL-HLT 2011
CountryUnited States
CityPortland, OR
Period19/6/1124/6/11

Fingerprint

Polarity
Prediction

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language

Cite this

Johansson, R., & Moschitti, A. (2011). Extracting opinion expressions and their polarities - Exploration of pipelines and joint models. In ACL-HLT 2011 - Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies (Vol. 2, pp. 101-106)

Extracting opinion expressions and their polarities - Exploration of pipelines and joint models. / Johansson, Richard; Moschitti, Alessandro.

ACL-HLT 2011 - Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies. Vol. 2 2011. p. 101-106.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Johansson, R & Moschitti, A 2011, Extracting opinion expressions and their polarities - Exploration of pipelines and joint models. in ACL-HLT 2011 - Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies. vol. 2, pp. 101-106, 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies, ACL-HLT 2011, Portland, OR, United States, 19/6/11.
Johansson R, Moschitti A. Extracting opinion expressions and their polarities - Exploration of pipelines and joint models. In ACL-HLT 2011 - Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies. Vol. 2. 2011. p. 101-106
Johansson, Richard ; Moschitti, Alessandro. / Extracting opinion expressions and their polarities - Exploration of pipelines and joint models. ACL-HLT 2011 - Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies. Vol. 2 2011. pp. 101-106
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