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AquaLog: An Ontology-Portable Question Answering System for the Semantic Web

  • Vanessa Lopez
  • Michele Pasin
  • Enrico Motta
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3532)

Abstract

As semantic markup becomes ubiquitous, it will become important to be able to ask queries and obtain answers, using natural language (NL) expressions, rather than the keyword-based retrieval mechanisms used by the current search engines. AquaLog is a portable question-answering system which takes queries expressed in natural language and an ontology as input and returns answers drawn from the available semantic markup. We say that AquaLog is portable, because the configuration time required to customize the system for a particular ontology is negligible. AquaLog combines several powerful techniques in a novel way to make sense of NL queries and to map them to semantic markup. Moreover it also includes a learning component, which ensures that the performance of the system improves over time, in response to the particular community jargon used by the end users. In this paper we describe the current version of the system, in particular discussing its portability, its reasoning capabilities, and its learning mechanism.

Keywords

Learning Mechanism Question Answering Name Entity Natural Language Interface Natural Language Query 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Berners-Lee, T., Hendler, J., Lassila, O.: The Semantic Web. Scientific American 284(5), 33–43 (2001)CrossRefGoogle Scholar
  2. 2.
    Mc Guinness, D.: Question Answering on the Semantic Web. IEEE Intelligent Systems 19(1), 82–85 (2004)CrossRefGoogle Scholar
  3. 3.
    Clark, P., Thompson, J., Porter, B.: A Knowledge-Based Approach to Question-Answering. In: The AAAI Fall Symposium on Question-Answering Systems, pp. 43–51. AAAI, Menlo Park (1999)Google Scholar
  4. 4.
    Cohen, W.W., Ravikumar, P., Fienberg, S.E.: A Comparison of String Distance Metrics for Name-Matching Tasks. In: IIWeb Workshop (2003), http://www-2.cs.cmu.edu/~wcohen/postscript/ijcai-ws-2003.pdf
  5. 5.
    Pasca, M., Harabagiu, S.: The Informative Role of WordNet in Open-Domain Question Answering. In: 2nd Meeting of the North American Chapter of the Association for Computational Linguistics, Naacl (2001)Google Scholar
  6. 6.
    JWNL (Java WordNet library), http://sourceforge.net/projects/jwordnet
  7. 7.
  8. 8.
    Mc Guinness, D., van Harmelen, F.: OWL Web Ontology Language Overview. W3C Recommendation 10 (2004), http://www.w3.org/TR/owl-features/
  9. 9.
    Cunningham, H., Maynard, D., Bontcheva, K., Tablan, V.: GATE: A Framework and Graphical Development Environment for Robust NLP Tools and Applications. In: Proceedings of the 40th Anniversary Meeting of the Association for Computational Linguistics (ACL 2002), Philadelphia (2002)Google Scholar
  10. 10.
    Tablan, V., Maynard, D., Bontcheva, K.: GATE - A Concise User Guide. University of Sheffield, UK, http://gate.ac.uk/
  11. 11.
    Copestake, A., Jones, K.S.: Natural language interfaces to databases. Knowledge Engineering Review 5(4), 225–249 (1990)CrossRefGoogle Scholar
  12. 12.
    Fellbaum, C. (ed.): WordNet, An Electronic Lexical Database. Bradford Books (May 1998)Google Scholar
  13. 13.
    Mitchell, T.M.: Machine learning. McGraw-Hill, New York (1997)zbMATHGoogle Scholar
  14. 14.
    Dzbor, M., Domingue, J., Motta, E.: Magpie – Towards a Semantic Web Browser. In: Fensel, D., Sycara, K., Mylopoulos, J. (eds.) ISWC 2003. LNCS, vol. 2870, pp. 690–705. Springer, Heidelberg (2003)CrossRefGoogle Scholar
  15. 15.
    Lopez, V., Motta, E.: Ontology Driven Question Answering in AquaLog. In: Meziane, F., Métais, E. (eds.) NLDB 2004. LNCS, vol. 3136, pp. 89–102. Springer, Heidelberg (2004)CrossRefGoogle Scholar
  16. 16.
    W3C, OWL Web Ontology Language Guide, http://www.w3.org/TR/2003/CR-owl-guide-0030818/
  17. 17.
    Burger, J., Cardie, C., Chaudhri, V., et al.: Tasks and Program Structures to Roadmap Research in Question & Answering (Q&A). NIST Technical Report (2001), http://www.ai.mit.edu/people/jimmylin/%0Apapers/Burger00-Roadmap.pdf
  18. 18.
    Kaplan, J.: Designing a portable natural language database query system. ACM Transactions on Database Systems 9(1), 1–19 (1984)CrossRefGoogle Scholar
  19. 19.
    Androutsopoulos, I., Ritchie, G.D., Thanisch, P.: MASQUE/SQL - An Efficient and Portable Natural Language Query Interface for Relational Databases. In: Chung, P.W., Lovegrove, G., Ali, M. (eds.) Proceedings of the 6th International Conference on Industrial and Engineering Applications of Artificial Intelligence and Expert Systems, Edinburgh, U.K, pp. 327–330. Gordon and Breach Publishers, New York (1993)Google Scholar
  20. 20.
    Chu-Carroll, J., Ferrucci, D., Prager, J., Welty, C.: Hybridization in Question Answering Systems. In: Maybury, M. (ed.) New Directions in Question Answering. AAAI Press, Menlo Park (2003)Google Scholar
  21. 21.
    Jung, H., Geunbae Lee, G.: Multilingual Question Answering with High Portability on Relational Databases. IEICE transactions on information and systems E86-D(2), 306–315 (2003)Google Scholar
  22. 22.
    Androutsopoulos, I., Ritchie, G.D., Thanisch, P.: Natural Language Interfaces to Databases - An Introduction. Natural Language Engineering 1(1), 29–81 (1995)CrossRefGoogle Scholar
  23. 23.
    Hunter, A.: Natural language database interfaces. Knowledge Management (2000)Google Scholar
  24. 24.
    De Roeck, A., Fox, N., Lowden, C.J., Turner, B.G.T., Walls, R.B.: A Natural Language System Based on Formal Semantics. In: Proceedings of the International Conference on Current Issues in Computational Linguistics, Pengang, Malaysia (1991)Google Scholar
  25. 25.
    Popescu, A.M., Etzioni, O., Kautz, H.A.: Towards a theory of natural language interfaces to databases. In: Proceedings of the International Conference on Intelligent User Interfaces, Miami, FL, USA, January 12-15, pp. 149–157 (2003)Google Scholar
  26. 26.
    Hirschman, L., Gaizauskas, R.: Natural Language question answering: the view from here. Natural Language Engineering, Special Issue on Question Answering 7(4), 275–300 (2001)Google Scholar
  27. 27.
    Moldovan, D., Harabagiu, S., Pasca, M., Mihalcea, R., Goodrum, R., Girju, R., Rus, V.: LASSO: A Tool for Surfing the Answer Net. In: Proceedings of the Text Retrieval Conference (TREC-8) (November 1999)Google Scholar
  28. 28.
    Srihari, K., Li, W., Li, X.: Information Extraction Supported Question- Answering. In: Strzalkowski, T., Harabagiu, S. (eds.) Advances in Open- Domain Question Answering. Kluwer Academic Publishers, Dordrecht (2004)Google Scholar
  29. 29.
    Hovy, E.H., Gerber, L., Hermjakob, U., Junk, M., Lin, C.-Y.: Question Answering in Webclopedia. In: Proceedings of the TREC-9 Conference, NIST, Gaithersburg, MD (2000)Google Scholar
  30. 30.
    Wu, M., Zheng, X., Duan, M., Liu, T., Strzalkowski, T.: Question Answering by Pattern Matching, Web-Proofing. In: Semantic Form Proofing. NIST Special Publication: The Twelfth Text REtrieval Conference (TREC), 500-255 (2003)Google Scholar
  31. 31.
    De Boni, M.: TREC 9 QA track overviewGoogle Scholar
  32. 32.
    Harabagiu, S., Moldovan, D., Pasca, M., Mihalcea, R., Surdeanu, M., Bunescu, R., Girju, R., Rus, V., Morarescu, P.: Falcon - Boosting Knowledge for Answer Engines. In: Proceedings of the 9thText Retrieval Conference (Trec-9), Gaithersburg, Maryland (November 2000)Google Scholar
  33. 33.
    Katz, B., Felshin, S., Yuret, D., Ibrahim, A., Lin, J., Marton, G., McFarland, A.J., Temelkuran, B.: Omnibase: Uniform Access to Heterogeneous Data for Question Answering. In: Andersson, B., Bergholtz, M., Johannesson, P. (eds.) NLDB 2002. LNCS, vol. 2553, pp. 230–234. Springer, Heidelberg (2002)CrossRefGoogle Scholar
  34. 34.
    Litkowski, K.C.: Syntactic Clues and Lexical Resources in Question-Answering. In: Voorhees, E. M., Harman, D. K (eds) Information Technology: The Ninth Text REtrieval Conferenence (TREC-9), NIST Special Publication 500-249. Gaithersburg, MD: National Institute of Standards and Technology, pp. 157–166 (2001)Google Scholar
  35. 35.
    Basili, R., Hansen, D.H., Paggio, P., Pazienza, M.T., Zanzotto, F.M.: Ontological resources and question answering Workshop on Pragmatics of Question Answering, held jointly with NAACL 2004 Boston, Massachusetts (May 2004)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Vanessa Lopez
    • 1
  • Michele Pasin
    • 1
  • Enrico Motta
    • 1
  1. 1.Knowledge Media InstituteThe Open UniversityMilton KeynesUnited Kingdom

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