Was M2 influenced by a art director , influenced by M3 , and influenced by a film director
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x1 a ns:film.film_art_director .
M2 ns:influence.influence_node.influenced_by ?x0 .
M2 ns:influence.influence_node.influenced_by ?x1 .
M2 ns:influence.influence_node.influenced_by M3
}