Question: Which items, did the actor that played in the movie, Mr. Edison at Work in His Chemical Laboratory, invent?
Answer(s):
answer: Movie camera
answer: Quadruplex telegraph
answer: Electric Power Distribution
answer: Mimeograph
answer: Phonograph
answer: Incandescent light bulb
answer: Carbon microphone
answer: Phonograph cylinder

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:film.actor.film ?k .
?k ns:film.performance.film ns:m.0pl2ykr . 
?c ns:law.inventor.inventions ?x .
}