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