Did M1 , M4 , M5 , and M6 executive produce M2 and M3 and executive produce M0 's prequel
SELECT count(*) WHERE {
?x0 ns:film.film.sequel M0 .
M1 ns:film.producer.films_executive_produced ?x0 .
M1 ns:film.producer.films_executive_produced M2 .
M1 ns:film.producer.films_executive_produced M3 .
M4 ns:film.producer.films_executive_produced ?x0 .
M4 ns:film.producer.films_executive_produced M2 .
M4 ns:film.producer.films_executive_produced M3 .
M5 ns:film.producer.films_executive_produced ?x0 .
M5 ns:film.producer.films_executive_produced M2 .
M5 ns:film.producer.films_executive_produced M3 .
M6 ns:film.producer.films_executive_produced ?x0 .
M6 ns:film.producer.films_executive_produced M2 .
M6 ns:film.producer.films_executive_produced M3
}