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