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