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Question answering passage retrieval using dependency relations

Published: 15 August 2005 Publication History

Abstract

State-of-the-art question answering (QA) systems employ term-density ranking to retrieve answer passages. Such methods often retrieve incorrect passages as relationships among question terms are not considered. Previous studies attempted to address this problem by matching dependency relations between questions and answers. They used strict matching, which fails when semantically equivalent relationships are phrased differently. We propose fuzzy relation matching based on statistical models. We present two methods for learning relation mapping scores from past QA pairs: one based on mutual information and the other on expectation maximization. Experimental results show that our method significantly outperforms state-of-the-art density-based passage retrieval methods by up to 78% in mean reciprocal rank. Relation matching also brings about a 50% improvement in a system enhanced by query expansion.

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cover image ACM Conferences
SIGIR '05: Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval
August 2005
708 pages
ISBN:1595930345
DOI:10.1145/1076034
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 15 August 2005

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Author Tags

  1. dependency parsing
  2. passage retrieval
  3. question answering

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  • (2024)Comparative Methods of Implementation for Different Question Answering Systems2024 5th International Conference on Intelligent Communication Technologies and Virtual Mobile Networks (ICICV)10.1109/ICICV62344.2024.00096(567-575)Online publication date: 11-Mar-2024
  • (2023)TopicAns: Topic-informed Architecture for Answer Recommendation on Technical Q&A SiteACM Transactions on Software Engineering and Methodology10.1145/360718933:1(1-25)Online publication date: 11-Jul-2023
  • (2023)A Comprehensive Review on Deep Learning Approaches for Question Answering and Machine Reading Comprehension in NLP2023 2nd Edition of IEEE Delhi Section Flagship Conference (DELCON)10.1109/DELCON57910.2023.10127327(1-6)Online publication date: 24-Feb-2023
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