Were M2 and M3 written by a editor and cinematographer of a film 's sequel and executive produced by a person
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x1 ns:film.cinematographer.film ?x2 .
?x1 ns:film.editor.film ?x2 .
?x2 ns:film.film.prequel ?x3 .
?x3 a ns:film.film .
M2 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.written_by ?x1 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x1
}