machine_question: when was the subject of the film Gore Vidal's Lincoln president
question: In what years was the main character of Gore Vidal's movie Lincoln president?
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:film.film_subject.films ns:m.04j21rb . 
  ?c ns:base.inaugurations.inauguration_speaker.inauguration ?x .
  }
  
webqsp_question: when was abe lincoln president