Which screenwriter that M1 , M2 , M3 , and M4 influenced was a film 's writer and director
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.writer .
?x0 ns:film.director.film ?x1 .
?x0 ns:film.writer.film ?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 .
?x0 ns:influence.influence_node.influenced_by M4 .
?x1 a ns:film.film
}