machine_question: what wars have france been involved in and is the event ended before 1991-02-28
question: Which wars involving France ended prior to February 28,1991?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.0f8l9c)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.0f8l9c ns:military.military_combatant.casualties ?y .
  ?y ns:military.casualties.military_conflict ?x .
  ?x ns:time.event.end_date ?num .
  FILTER (?num < "1991-02-28"^^xsd:dateTime) . 
  }
webqsp_question: what wars have france been involved in