Question: Who invented the organization whose leadership includes a person named Brett Prescott?
Answer(s):
answer: Eduardo Saverin
answer: Mark Zuckerberg
answer: Andrew McCollum
answer: Dustin Moskovitz
answer: Chris Hughes

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:organization.organization.leadership ?k .
?k ns:organization.leadership.person ns:m.011dy3vg . 
?c ns:organization.organization.founders ?x .
}