Question: Which person who was once a student owned Google in 2012?
Answer(s):
answer: Larry Page

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.045c7b)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.045c7b 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) })
?x ns:influence.influence_node.influenced ?c .
?c ns:people.person.profession ns:m.014cnc . 
}