Question: What person dies on 1931-04-10 and was the foudner of Southwest Airlines?
Answer(s):
answer: Rollin King

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0gztl)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0gztl ns:organization.organization.founders ?x .
?x ns:people.person.date_of_birth "1931-04-10"^^xsd:dateTime . 
}