Question: Who owned Keyhole, Inc in 2012?
Answer(s):
answer: Vic Gundotra
answer: Patrick Pichette
answer: Nikesh Arora
answer: David Drummond
answer: Larry Page

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.child ?k .
?k ns:organization.organization_relationship.child ns:m.027l9_5 . 
?c ns:organization.organization.leadership ?y .
?y ns:organization.leadership.person ?x .
FILTER(NOT EXISTS {?y ns:organization.leadership.from ?sk0} || 
EXISTS {?y ns:organization.leadership.from ?sk1 . 
FILTER(xsd:datetime(?sk1) <= "2012-12-31"^^xsd:dateTime) })
FILTER(NOT EXISTS {?y ns:organization.leadership.to ?sk2} || 
EXISTS {?y ns:organization.leadership.to ?sk3 . 
FILTER(xsd:datetime(?sk3) >= "2012-01-01"^^xsd:dateTime) })
}