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Techniques for dynamic summaries

  • Find small windows in doc that contain query terms

    • Requires fast window lookup in a document cache

  • Score each window wrt query

    • Use various features such as window width, position in document, etc.

    • Combine features through a scoring function – methodology to be covered Nov 12th

  • Challenges in evaluation: judging summaries

    • Easier to do pairwise comparisons rather than binary relevance assessments

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