machine_question: where was the public speaker which spoke about Berlin Wall raised
question: Where was the person who spoke about the Berlin Wall raised?
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:event.public_speaker.speeches_or_presentations ?k .
  ?k ns:event.speech_or_presentation.speech_topic ns:m.017f5 . 
  ?c ns:people.person.place_of_birth ?x .
  }
  
webqsp_question: where was john f kennedy raised