Question: What form of art were created by the person who illustrated the book De Divina proportione?
Answer(s):
answer: Drawing
answer: Painting
answer: Sculpture

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:book.illustrator.books_illustrated ns:m.06pqb_7 . 
?c ns:visual_art.visual_artist.art_forms ?x .
}