Question: In which city is the Purdue University Cancer Center located?
Answer(s):
answer: West Lafayette

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:medicine.cancer_center_constituent.cancer_center ns:m.04_7l_n . 
?c ns:location.location.street_address ?y .
?y ns:location.mailing_address.citytown ?x .
}