Was M3 edited by a editor of M1 and M2 and edited by M0 's executive producer
SELECT count(*) WHERE {
?x0 ns:film.producer.films_executive_produced M0 .
?x1 ns:film.editor.film M1 .
?x1 ns:film.editor.film M2 .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.edited_by ?x1
}