Snowball: extracting relations from large plain-text collections
DL '00 Proceedings of the fifth ACM conference on Digital libraries
Scaling question answering to the Web
Proceedings of the 10th international conference on World Wide Web
Learning search engine specific query transformations for question answering
Proceedings of the 10th international conference on World Wide Web
Exploiting redundancy in question answering
Proceedings of the 24th annual international ACM SIGIR conference on Research and development in information retrieval
Mining the web for answers to natural language questions
Proceedings of the tenth international conference on Information and knowledge management
Context and Page Analysis for Improved Web Search
IEEE Internet Computing
Open-domain textual question answering techniques
Natural Language Engineering
Semantics of conceptual graphs
ACL '79 Proceedings of the 17th annual meeting on Association for Computational Linguistics
Learning surface text patterns for a Question Answering system
ACL '02 Proceedings of the 40th Annual Meeting on Association for Computational Linguistics
TREC: Experiment and Evaluation in Information Retrieval (Digital Libraries and Electronic Publishing)
A semantic approach to IE pattern induction
ACL '05 Proceedings of the 43rd Annual Meeting on Association for Computational Linguistics
Learning of graph-based question answering rules
TextGraphs-1 Proceedings of the First Workshop on Graph Based Methods for Natural Language Processing
Answer formulation for question-answering
AI'03 Proceedings of the 16th Canadian society for computational studies of intelligence conference on Advances in artificial intelligence
Towards a multilingual QA system based on the web data redundancy
AWIC'05 Proceedings of the Third international conference on Advances in Web Intelligence
Semantically Expanding Questions for Supervised Automatic Classification
FQAS '09 Proceedings of the 8th International Conference on Flexible Query Answering Systems
Towards automatic question answering over social media by learning question equivalence patterns
WSA '10 Proceedings of the NAACL HLT 2010 Workshop on Computational Linguistics in a World of Social Media
Passage retrieval in log files: an approach based on query enrichment
IceTAL'10 Proceedings of the 7th international conference on Advances in natural language processing
Model-driven restricted-domain adaptation of question answering systems for business intelligence
Proceedings of the 2nd International Workshop on Business intelligencE and the WEB
Enhanced semantic expansion for question classification
International Journal of Internet Technology and Secured Transactions
Bootstrap-Based equivalent pattern learning for collaborative question answering
CICLing'12 Proceedings of the 13th international conference on Computational Linguistics and Intelligent Text Processing - Volume Part II
| Hi-index | 0.00 |
In this paper, we discuss a novel technique based on semantic constraints to improve the performance and portability of a reformulation-based question answering system. First, we present a method for acquiring semantic-based reformulations automatically. The goal is to generate patterns from sentences retrieved from the Web based on lexical, syntactic and semantic constraints. Once these constraints have been defined, we present a method to evaluate and re-rank candidate answers that satisfy these constraints using redundancy. The two approaches have been evaluated independently and in combination. The evaluation on 493 questions from TREC-11 shows that the automatically acquired semantic patterns increase the MRR by 26%, the re-ranking using semantic redundancy increases the MRR by 67%, and the two approaches combined increase the MRR by 73%. This new technique allows us to avoid the manual work of formulating semantically equivalent reformulations; while still increasing performance.