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