Optimizing story link detection is not equivalent to optimizing new event detection

  • Authors:
  • Ayman Farahat;Francine Chen;Thorsten Brants

  • Affiliations:
  • PARC, Palo Alto, CA;PARC, Palo Alto, CA;PARC, Palo Alto, CA

  • Venue:
  • ACL '03 Proceedings of the 41st Annual Meeting on Association for Computational Linguistics - Volume 1
  • Year:
  • 2003

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Abstract

Link detection has been regarded as a core technology for the Topic Detection and Tracking tasks of new event detection. In this paper we formulate story link detection and new event detection as information retrieval task and hypothesize on the impact of precision and recall on both systems. Motivated by these arguments, we introduce a number of new performance enhancing techniques including part of speech tagging, new similarity measures and expanded stop lists. Experimental results validate our hypothesis.