Who was influenced by a screenwriter that wrote M3 and M4 and influenced by M1
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 .
?x1 a ns:film.writer .
?x1 ns:film.writer.film M3 .
?x1 ns:film.writer.film M4
}