Were M2 and M4 influenced by M3 , influenced by a art director , and influenced by a person
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x1 a ns:people.person .
M2 ns:influence.influence_node.influenced_by ?x0 .
M2 ns:influence.influence_node.influenced_by ?x1 .
M2 ns:influence.influence_node.influenced_by M3 .
M4 ns:influence.influence_node.influenced_by ?x0 .
M4 ns:influence.influence_node.influenced_by ?x1 .
M4 ns:influence.influence_node.influenced_by M3
}