machine_question: who fought in the battle of vicksburg and the person's date of death is latest
question: Who is the person who fought in the Battle of Vicksburg who died the latest?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.01hf7f)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.01hf7f ns:base.culturalevent.event.entity_involved ?x .
  ?x ns:people.deceased_person.date_of_death ?num .
  }
  ORDER BY DESC(?num) LIMIT 1
webqsp_question: who fought in the battle of vicksburg