Were M1 , M2 , and M3 edited by and written by a film 's producer , writer , and editor
SELECT count(*) WHERE {
?x0 ns:film.editor.film ?x1 .
?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
?x0 ns:film.writer.film ?x1 .
?x1 a ns:film.film .
M1 ns:film.film.edited_by ?x0 .
M1 ns:film.film.written_by ?x0 .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.written_by ?x0 .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.written_by ?x0
}