Who did a director and editor of M3 and M4 influence and M1 and M2 influence
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 ns:film.director.film M3 .
?x1 ns:film.director.film M4 .
?x1 ns:film.editor.film M3 .
?x1 ns:film.editor.film M4
}