Were M2 and M4 produced by a film editor that executive produced M1 and executive produced by M3
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:film.producer.films_executive_produced M1 .
M2 ns:film.film.executive_produced_by M3 .
M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M4 ns:film.film.executive_produced_by M3 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}