LaSEWeb: Automating Search Strategies over Semi-structured Web Data

author: Oleksandr Polozov, Department of Computer Science and Engineering, University of Washington
published: Oct. 7, 2014,   recorded: August 2014,   views: 1700
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Description

We show how to programmatically model processes that humans use when extracting answers to queries (e.g., "Who invented typewriter?", "List of Washington national parks") from semi-structured Web pages returned by a search engine. This modeling enables various applications including automating repetitive search tasks, and helping search engine developers design micro-segments of factoid questions.

We describe the design and implementation of a domain-specific language that enables extracting data from a webpage based on its structure, visual layout, and linguistic patterns. We also describe an algorithm to rank multiple answers extracted from multiple webpages.

On 100,000+ queries (across 7 micro-segments) obtained from Bing logs, our system LaSEWeb answered queries with an average recall of 71%. Also, the desired answer(s) were present in top-3 suggestions for 95%+ cases.

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Download slides icon Download slides: kdd2014_polozov_laseweb_01.pdf (938.5┬áKB)


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