Publication Type |
Journal Article |
School or College |
College of Engineering |
Department |
Computing, School of |
Creator |
Riloff, Ellen M. |
Other Author |
Choi, Yejin; Cardie, Claire; Patwardhan, Siddharth |
Title |
Identifying sources of opinions with conditional random fields and extraction patterns |
Date |
2005 |
Description |
Recent systems have been developed for sentiment classification, opinion recognition, and opinion analysis (e.g., detecting polarity and strength). We pursue another aspect of opinion analysis: identifying the sources of opinions, emotions, and sentiments. We view this problem as an information extraction task and adopt a hybrid approach that combines Conditional Random Fields (Lafferty et al., 2001) and a variation of AutoSlog (Riloff, 1996a). While CRFs model source identification as a sequence tagging task, AutoSlog learns extraction patterns. Our results show that the combination of these two methods performs better than either one alone. The resulting system identifies opinion sources with 79:3% precision and 59:5% recall using a head noun matching measure, and 81:2% precision and 60:6% recall using an overlap measure. |
Type |
Text |
Publisher |
Association for Computational Linguistics |
First Page |
1 |
Last Page |
8 |
Subject |
Sentiment classification; Opinion recognition; Opinion analysis; Conditional random fields; AutoSlog; Sources of opinions |
Subject LCSH |
Information retrieval |
Language |
eng |
Bibliographic Citation |
Choi, Y., Cardie, C., Riloff, E. M., & Patwardhan, S. (2005). Identifying sources of opinions with conditional random fields and extraction patterns. Proceedings of the 2005 Human Language Technology Conference / Conference on Empirical Methods in Natural Language Processing (HLT/EMNLP-05), 1-8. |
Rights Management |
(c) Choi, Y., Cardie, C., Riloff, E. M., & Patwardhan, S. |
Format Medium |
application/pdf |
Format Extent |
100,762 bytes |
Identifier |
ir-main,12431 |
ARK |
ark:/87278/s6v12p0n |
Setname |
ir_uspace |
ID |
703056 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6v12p0n |