Was a film director influenced by M4 's director , influenced by M1 and M2 , and influenced by M3
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x0 ns:influence.influence_node.influenced_by M3 .
?x1 ns:film.director.film M4
}