Which film director was influenced by a film director , was influenced by M2 , and influenced M1
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.director .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x1 a ns:film.director
}