machine_question: what year did the sports team arena stadium is M&T Bank Stadium win super bowl
question: What is the year that the team whose's arena is the M&T Bank Stadium won the Superbowl?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ?c)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ?c ns:sports.sports_team.arena_stadium ns:m.01yq7r . 
  ?c ns:sports.sports_team.championships ?x .
  ?x ns:common.topic.notable_types ns:m.01xljv1 .
  }
  
webqsp_question: what year did baltimore ravens win super bowl