Did M5 and M6 edit a film that was executive produced by M1 , M2 , and M3 and was written by M4
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.executive_produced_by M2 .
?x0 ns:film.film.executive_produced_by M3 .
?x0 ns:film.film.written_by M4 .
M5 ns:film.editor.film ?x0 .
M6 ns:film.editor.film ?x0
}