machine_question: what were adolf hitler 's parents names and that died on 1903-01-03
question: What was the name of Adolf Hitler's parent who died on January 3, 1903?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.07_m9_)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.07_m9_ ns:people.person.parents ?x .
  ?x ns:people.deceased_person.date_of_death "1903-01-03"^^xsd:dateTime . 
  }
webqsp_question: what were adolf hitler 's parents names