Question: What is the name of the parent of Betty White who was employed as a salesman?
Answer(s):
answer: Horace Lawrence White

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.025mb_)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.025mb_ ns:people.person.parents ?x .
?x ns:people.person.profession ns:m.02_6rb1 . 
}