machine_question: where did the person education institution is Stratford Northwestern Secondary School grew up
question: Where did the person who went to Statford Northwestern Secondary school grow up?
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:people.person.education ?k .
  ?k ns:education.education.institution ns:m.02w1qmc . 
  ?c ns:people.person.place_of_birth ?x .
  }
  
webqsp_question: where did justin bieber grew up