What film producer that a actor of M3 and M4 was influenced by and M1 was influenced by was influenced by M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.producer .
?x0 ns:influence.influence_node.influenced ?x1 .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x1 ns:film.actor.film/ns:film.performance.character M3 .
?x1 ns:film.actor.film/ns:film.performance.character M4
}