Question: What school did Tupac attend, that has an organization headquarters, located in the city of Mill Valley?
Answer(s):
answer: Tamalpais High School

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07pzc)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07pzc ns:people.person.education ?y .
?y ns:education.education.institution ?x .
?x ns:organization.organization.headquarters ?c .
?c ns:location.mailing_address.citytown ns:m.0r1gl . 
}