Were M2 and M4 written by a film producer , edited by a person , and executive produced by M3
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x1 a ns:people.person .
M2 ns:film.film.edited_by ?x1 .
M2 ns:film.film.executive_produced_by M3 .
M2 ns:film.film.written_by ?x0 .
M4 ns:film.film.edited_by ?x1 .
M4 ns:film.film.executive_produced_by M3 .
M4 ns:film.film.written_by ?x0
}