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Corroborate and Learn Facts from the Web

Corroborate and Learn Facts from the Web. Presenter : Lin, Shu -Han Authors : Shubin Zhao, Jonathan Betz. SIGKDD (2008). Outline. Motivation Objective Methodology Experiments Conclusion Comments. Wikipedia. Motivation. moviefone.com. Infoplease.com. Many “Facts”

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Corroborate and Learn Facts from the Web

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  1. Corroborate and Learn Factsfrom the Web Presenter : Lin, Shu-Han Authors : Shubin Zhao,Jonathan Betz SIGKDD(2008)

  2. Outline • Motivation • Objective • Methodology • Experiments • Conclusion • Comments

  3. Wikipedia Motivation moviefone.com Infoplease.com • Many“Facts” • Themovie“Independenceday”

  4. Motivation • Combinethem • MentionedThedirectorofmovie “Roland Emmerich”

  5. Objectives Attribute value • Cachethenew“facts”:attribute+value • HavethesameHTMLpatterns • Thencorroboratethesenew“facts” • Checkotherwebsitealsomentionedaboutthese“facts”ornot • LearnthisfactGoodfact:commonlyreferenced.Incorrectfacts:veryfewmentioned.

  6. Methodology – Overview 3.Extract New facts 1.RelevantPage 2.Match SearchEngine Wiki、Seedset 6

  7. Methodology – Corroboratefact– Commonfact Match • Acommonfact • “Susan”,gender:female • Threshold: 7

  8. Methodology – ExtractNewfacts 3.Extract New facts Cache“RepeatedHTMLpatterns” 8

  9. Experiments 9

  10. Experiments 10

  11. Conclusions • Findrelevantpagesaboutentities • Extractnewfactsbycorroboratingexistingfacts • BaseonstringmatchandHTMLpatterndiscovery

  12. Comments • Advantage • Ideaisintuitive • Languageindependent • Searchandintegrateinformation/dataonweb • Drawback • Canonlyadapttotheoldentitiesor • Lotsofinformationhideinthearticles,notonlytables. • Application • Wecan’tuseittoextractthecommentornewinformation,suchasthecommentsoffoodintheblog

  13. Editdistance

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