A maximum entropy approach to natural language processing
Computational Linguistics
PRINCIPAR: an efficient, broad-coverage, principle-based parser
COLING '94 Proceedings of the 15th conference on Computational linguistics - Volume 1
Lexical chains for question answering
COLING '02 Proceedings of the 19th international conference on Computational linguistics - Volume 1
Statistical QA - classifier vs. re-ranker: what's the difference?
MultiSumQA '03 Proceedings of the ACL 2003 workshop on Multilingual summarization and question answering - Volume 12
Exploring syntactic relation patterns for question answering
IJCNLP'05 Proceedings of the Second international joint conference on Natural Language Processing
A predictive framework for retrieving the best answer
Proceedings of the 2008 ACM symposium on Applied computing
BVideoQA: Online English-Chinese bilingual video question answering
Journal of the American Society for Information Science and Technology
Event matching using the transitive closure of dependency relations
HLT-Short '08 Proceedings of the 46th Annual Meeting of the Association for Computational Linguistics on Human Language Technologies: Short Papers
Question answering based on semantic roles
DeepLP '07 Proceedings of the Workshop on Deep Linguistic Processing
Answer validation by information distance calculation
IRQA '08 Coling 2008: Proceedings of the 2nd workshop on Information Retrieval for Question Answering
A graph-based semi-supervised learning for question-answering
ACL '09 Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP: Volume 2 - Volume 2
Investigation of question classifier in question answering
EMNLP '09 Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing: Volume 2 - Volume 2
LDA based similarity modeling for question answering
SS '10 Proceedings of the NAACL HLT 2010 Workshop on Semantic Search
Cross-lingual slot filling from comparable corpora
BUCC '11 Proceedings of the 4th Workshop on Building and Using Comparable Corpora: Comparable Corpora and the Web
Sibyl, a factoid question-answering system for spoken documents
ACM Transactions on Information Systems (TOIS)
Answer sentence retrieval by matching dependency paths acquired from question/answer sentence pairs
EACL '12 Proceedings of the 13th Conference of the European Chapter of the Association for Computational Linguistics
Answer extraction from passage graph for question answering
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
Divisible transition systems and multiplanar dependency parsing
Computational Linguistics
Hi-index | 0.00 |
In this paper, we explore correlation of dependency relation paths to rank candidate answers in answer extraction. Using the correlation measure, we compare dependency relations of a candidate answer and mapped question phrases in sentence with the corresponding relations in question. Different from previous studies, we propose an approximate phrase mapping algorithm and incorporate the mapping score into the correlation measure. The correlations are further incorporated into a Maximum Entropy-based ranking model which estimates path weights from training. Experimental results show that our method significantly outperforms state-of-the-art syntactic relation-based methods by up to 20% in MRR.