machine_question: what are the names of walt disney kids and the person's date of death is before 2013-11-19
question: Which of Walt Disney kids, who'c date of death is before November 19, 2013?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.081nh)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.081nh ns:people.person.children ?x .
  ?x ns:people.deceased_person.date_of_death ?num .
  FILTER (?num < "2013-11-19"^^xsd:dateTime) . 
  }
webqsp_question: what are the names of walt disney kids