University of waterloo at INEX 2009: ad hoc, book, entity ranking, and link-the-wiki tracks

  • Authors:

  • Kelly Y. Itakura;Charles L. A. Clarke

  • Affiliations:

  • University of Waterloo, Waterloo, ON, Canada;University of Waterloo, Waterloo, ON, Canada

  • Venue:
  • INEX'09 Proceedings of the Focused retrieval and evaluation, and 8th international conference on Initiative for the evaluation of XML retrieval
  • Year:
  • 2009

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Abstract

This year, University of Waterloo participated in four tracks; Ad Hoc, Book, Entity Ranking, and Link-the-Wiki tracks. In Ad Hoc and Book tracks, we implemented a variation of Okapi BM25F [20,5,18,15] that gave substantial improvements over the baseline BM25 that ranked first in the previous year [12,13], during the training and in the official Ad Hoc-focused results. In Entity ranking track, we used redundancy techniques [4] for question answering to retrieve entities. In Link-the-Wiki track, we employed topic-oriented PageRank with KL divergence in addition to the baseline described in [11].