Question: What is the art style of the artist who said "A good picture is equivalent to a good deed."?
Answer(s):
answer: Post-Impressionism

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.048hbpf . 
?c ns:visual_art.visual_artist.associated_periods_or_movements ?x .
}