Who was influenced by M1 , was influenced by a film producer that M4 starred , and was influenced by M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x1 a ns:film.producer .
?x1 ns:film.actor.film/ns:film.performance.film M4
}