Question: What was an invention of one of the politicians that were appointed to their position by Contential Congress?
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:government.politician.government_positions_held ?k .
?k ns:government.government_position_held.appointed_by ns:m.09k5k . 
?c ns:law.inventor.inventions ?x .
}