Question: What's the name of the TCP IP reference model developer whose organization is headquartered in San Diego?
Answer(s):
answer: Robert  E. Kahn

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07hzk)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07hzk ns:base.argumentmaps.original_idea.innovator ?x .
?x ns:organization.organization.headquarters ?c .
?c ns:location.mailing_address.citytown ns:m.071vr . 
}