Question: What trades was the person who quoted "No one is wise or safe, but they that are honest." known for?
Answer(s):
answer: Sailor
answer: Courtier
answer: Poet
answer: Soldier
answer: Writer

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.048cn0p . 
?c ns:people.person.profession ?x .
}