machine_question: where do the houston rockets play basketball and is the sports facility where Houston Aeros play
question: What sports facility is used by both Houston Rockets and Aeros?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.0jmfb)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.0jmfb ns:sports.sports_team.arena_stadium ?x .
  ?x ns:sports.sports_facility.home_venue_for ?c .
  ?c ns:sports.team_venue_relationship.team ns:m.068hn0 . 
  }
webqsp_question: where do the houston rockets play basketball