Question: What did the person that said "Mysteries are due to secrecy" do?
Answer(s):
answer: Spy
answer: Statesman
answer: Philosopher
answer: Scientist
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.048c4m_ . 
?c ns:people.person.profession ?x .
}