Organizing the People’s Voices on Political Controversies

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Organizing the Peoples Voices on Political Controversies . Politicians have opinions (but none of us can remember them). Lots of issues, stake - holders, opinions Great to have an opinion-base which tells us who stands where. An opinion-base. Opinion Network. Illegal_Immigration. - PowerPoint PPT Presentation

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Organizing the Peoples Voices on Political Controversies

Organizing the Peoples Voices on Political Controversies Rawia AwadallahGerhard WeikumMax-Planck Institute for Informatics, GermanyMaya RamanathIIT-Delhi, IndiaPoliticians have opinions(but none of us can remember them)

Lots of issues, stake-holders, opinionsGreat to have an opinion-base which tells us who stands whereAn opinion-baseEntityPolarityTopicContextBarack ObamasupportsMilitary Action in LibyaPresident Obama Authorizes Limited Military Action in Libya...Nicolas SarkozysupportsMilitary Action in LibyaSarkozy supports military action in LibyaUN Security CouncilsupportsNo-Fly Zone on LibyaU.N. Security Council approves no-fly zone in LibyaGermanyopposesNo-Fly Zone on LibyaGermany blocks plans for Libya no fly zoneOpinion NetworkBarack_ObamaAngela_MerkelUN_Security_CouncilMilitary_Action_in_LibyaNo-fly_ZoneGaddafis_Response_to_Civil_WarLibyan_Civil_War_2011War_Crimes_in_LibyaIllegal_ImmigrationSSOOSEntitiesFacetsTopic HierarchyOpinioNetIt

EntityAfghan PresidentFacetTalks with TalibanHamid_KarzaiAfghan PresidentKarzaiTaliban_NegotiationsTaliban TalksTalks with TalibanPrime Minister David Cameron met Mr Gates in Downing Street on Monday and restated his support for American strategy in Afghanistan.Acquiring SnippetsWebNewspapers: AlJazeera, CNN, BBCWikipediaSeed phrases as querieshe supports, she supportshe voted for, he voted againstCandidate Opinion- SnippetsRepublican Senator Jon Kyl is a supporter of the Arizona immigration lawRobert Gates, the US defence secretary, has acknowledged that projections that are based on proposed military timelines may not be accurate, but stressed that the Pentagon is not exempt from belt-tightening because of its charge of defending the country.Prime Minister David Cameron met Mr Gates in Downing Street on Monday and restated his support for American strategy in Afghanistan.Republican Senator Jon Kyl is a supporter of the Arizona immigration lawEntity and facetParse sentence to extract entity and facetDependency parsing used: look for subject and objectLots of heuristicsExpected parsing to be easyIt was easier, not easy

Entity and facet extractionCandidate Opinion- SnippetsRobert Gates, the US defence secretary, has acknowledged that projections that are based on proposed military timelines may not be accurate, but stressed that the Pentagon is not exempt from belt-tightening because of its charge of defending the country.Raw facets and entitiesLots of entitiesGaddaffi, QaddaffiObama, U.S. PresidentLots of raw facetsUN mandate against Libyause of force against Libyan civiliansmilitary air strikes on Libyan citiescoalition air strikes on LibyaEntity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsCanonical namesCanonical names derived from YAGO

Entity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsmeanspreferred meaningmeans9 Canonical facets (1/3)WikipediaGood source for labelsTopics not always controversialDebatepediaLots of debatesDebates mean controversial topicsMap to Debatepedia, then to Wikipedia

Entity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsHe supports Chelsea not controversial at all, but will be mapped in Wikipedia.10 Canonical facets (2/3)Entity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsArticle titleCategory 1, 2,ARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTD1kCategory 1, 2,ARTICLETEXTTOPIC T1Article titleCategory 1, 2,ARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTDnjCategory 1, 2,ARTICLETEXTTOPIC Tn

Debatepedia ArticlesCanonical facets (3/3)Entity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsArticle titleCategory 1, 2,ARTICLETEXTTopic T, Document Di

Used for ranking debatesScores of top-10 results used to discard useless facetsTitle of top debate used for canonical nameRaw facet, fA good facet usually maps to about 5 good topics.12Topic HierarchyDebatepedia to WikipediaEntity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsOrganization of topic hierarchyCanonical facet name + documentArticle titleCategory 1, 2,ARTICLETEXTARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTArticle titleCategory 1, 2,ARTICLETEXTTop 3 Wikipedia articlesTop 3 Wikipedia categoriesCandidate categoriesConstructing the hierarchyEntity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsOrganization of topic hierarchyIran-Iraq WarIraq WarIrans nuclear energyBilateral relations of IsraelIsraels weapons of mass destructionIsraeli-Palestinian conflictIsraeli Nuclear EnergyIrans nuclear programIrans weaponsIrans politics410Depends on no. of raw facets mapped to itDepends on no. of common subcategoriesConstructing the hierarchyEntity and facet extractionCandidate Opinion- SnippetsCanonical forms for entities and facetsOrganization of topic hierarchyIran-Iraq WarIraq WarBilateral relations of IsraelIsraels weapons of mass destructionIsraeli-Palestinian conflictIsraeli Nuclear EnergyIrans nuclear programIrans weaponsIrans politicsIrans nuclear energyGraph coarsening algorithm to cluster leads to a hypergraphBuilding a lexiconUnsupervisedQuery Google with pairsSupervised (details in the paper)n-gramsmutual informationsynonyms and antonymsCandidate Opinion- SnippetsEntity and facet extractionLexicon of Support/Oppose phrasesCanonical forms for entities and facetsOrganization of topic hierarchyLexicon of support/oppose phrasesObama strongly defends US Military Action in Libya Barack Obama has aligned himself with Nicolas Sarkozy by committing to support military action in Libya US President Barack Obama defended his decision to launch military action in Libya President Obama said Saturday that he had authorized limited military action in Libya President Obama tells Americans that he ordered military action in Libya SUPPORTOPPOSEapprovecriticizedacknowledgespeak againstcampaigned forcampaigned againststrongly defendsattacksUnsupervisedEvaluationEnd-to-end experiments (Metric: Precision)Random sampleFocused sampleGround truth setQuality of topic hierarchy Quality of support/oppose lexicon

18End-to-end experimentsAlJazeeraBBCCNNGoogleNYTimesWikipediaOverall#9703349265068619877594129648Prec.0.720.660.780.790.740.690.722000 randomly selected opinions were evaluatedErrors in extractionAttributing the opinion to the incorrect entity (45%)Facet extraction (45%)Seeds were incorrect (9%)Thank you

Time to express your opinions!Candidate Opinion- SnippetsEntity and facet extractionLexicon of Support/Oppose phrasesCanonical forms for entities and facetsOrganization of topic hierarchySome StatisticsSourcesAl-Jazeera, BBC, CNN, NYTimes, Wikipedia, Google NewsNo. of seeds17No. of snippets2000 per seedInitial set of named entities/facets14000 and 23000No. of canonicalized facets4000No. of wikipedia categories5000

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