machine_question: what guitar did the actor that played in the film The Best of MusikLaden: Vols. 1 & 2 play
question: What was the guitar played by an actor in The Best of MusikLaden: Vols. 1 & 2?
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.actor.film ?k .
  ?k ns:film.performance.film ns:m.0crxkdt . 
  ?c ns:music.guitarist.guitars_played ?x .
  }
  
webqsp_question: what guitar did joe walsh play