Was M1 written by M3 , executive produced by M2 , and executive produced by a film editor
SELECT count(*) WHERE {
?x0 a ns:film.editor .
M1 ns:film.film.executive_produced_by ?x0 .
M1 ns:film.film.executive_produced_by M2 .
M1 ns:film.film.written_by M3
}