Did M2 and M4 direct M1 's sequel , produce a film , and executive produce M3
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x1 ns:film.film.prequel M1 .
M2 ns:film.director.film ?x1 .
M2 ns:film.producer.films_executive_produced M3 .
M2 ns:film.producer.film|ns:film.production_company.films ?x0 .
M4 ns:film.director.film ?x1 .
M4 ns:film.producer.films_executive_produced M3 .
M4 ns:film.producer.film|ns:film.production_company.films ?x0
}