Question: Where was the person born who said "Whoever is happy will make others happy too."?
Answer(s):
answer: Frankfurt

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.048dnzh . 
?c ns:people.person.place_of_birth ?x .
}