Question: Which prominent organization founder is responsible for founding facebook?
Answer(s):
answer: Mark Zuckerberg

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0hmyfsv)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0hmyfsv ns:organization.organization.founders ?x .
?x ns:influence.influence_node.influenced ?c .
?c ns:kg.object_profile.prominent_type ns:organization.organization_founder . 
}