Who directed M1 and M2 and directed a film executive produced and written by M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.director.film ?x1 .
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
?x1 a ns:film.film .
?x1 ns:film.film.executive_produced_by M4 .
?x1 ns:film.film.written_by M4
}