Question: What was the profession of the person who said "You cannot simultaneously prevent and prepare for war."?
Answer(s):
answer: Teacher
answer: Philosopher
answer: Theoretical Physicist
answer: Mathematician
answer: Physicist
answer: Scientist
answer: Writer
answer: Author

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:people.person.quotations ns:m.048hj7v . 
?c ns:people.person.profession ?x .
}