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A Graph Traversal Based Approach to Answer Non-Aggregation Questions over DBpedia

  • Chenhao ZhuEmail author
  • Kan Ren
  • Xuan Liu
  • Haofen Wang
  • Yiding Tian
  • Yong Yu
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9544)

Abstract

We present a question answering system over DBpedia, filling the gap between user information needs expressed in natural language and a structured query interface expressed in SPARQL over the underlying knowledge base (KB). Given the KB, our goal is to comprehend a natural language query and provide corresponding accurate answers. Focusing on solving the non-aggregation questions, in this paper, we construct a subgraph of the knowledge base from the detected entities and propose a graph traversal method to solve both the semantic item mapping problem and the disambiguation problem in a joint way. Compared with existing work, we simplify the process of query intention understanding and pay more attention to the answer path ranking. We evaluate our method on a non-aggregation question dataset and further on a complete dataset. Experimental results show that our method achieves best performance compared with several state-of-the-art systems.

Keywords

Question Answering Non-aggregation questions Linked data Graph traversal Path ranking 

Notes

Acknowledgments

This work was partially supported by the National Science Foundation of China (project No: 61402173) and the Fundamental Research Funds for the Central Universities (Grant No: 22A201514045).

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Chenhao Zhu
    • 1
    Email author
  • Kan Ren
    • 1
  • Xuan Liu
    • 1
  • Haofen Wang
    • 2
  • Yiding Tian
    • 1
  • Yong Yu
    • 1
  1. 1.Shanghai Jiao Tong UniversityShanghaiChina
  2. 2.East China University of Science and TechnologyShanghaiChina

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