Question: What was invented by the person who said "Who is rich? He that rejoices in his portion."?
Answer(s):
answer: Lightning rod
answer: Bifocals
answer: Glass harmonica
answer: Franklin stove

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.048k067 . 
?c ns:law.inventor.inventions ?x .
}