what is the name of the polling authority for election polls released no earlier than 10/26/2012?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
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NBC News The Wall Street Journal Public Policy Polling Rasmussen Reports Zogby International Gallup ABC News The Washington Post Ipsos Reuters Pew Research Center Christian Science Publishing Society Investor's Business Daily YouGov Greenberg Quinlan Rosner Politico George Washington University Monmouth University Fox News Channel CNN CBS News The New York Times NPR
class class literal
government.polling_authority government.election_poll 2012-10-26^^http://www.w3.org/2001/XMLSchema#date
government.polling_authority government.election_poll type.datetime
Polling authority Election poll 10/26/2012
none none >=
government.polling_authority.polls government.election_poll.release_date
Election polls Release date
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :government.polling_authority . 
?x1 :type.object.type :government.election_poll . 
FILTER (?x2 >= "2012-10-26-08:00"^^<http://www.w3.org/2001/XMLSchema#date>)
?x0 :government.polling_authority.polls ?x1 . 
?x1 :government.election_poll.release_date ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND government.polling_authority (JOIN government.polling_authority.polls (ge government.election_poll.release_date 2012-10-26^^http://www.w3.org/2001/XMLSchema#date)))