Did M2 , M3 , M4 , and M5 executive produce a film whose sequel was written by and executive produced by M1
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.sequel ?x1 .
?x1 ns:film.film.executive_produced_by M1 .
?x1 ns:film.film.written_by M1 .
M2 ns:film.producer.films_executive_produced ?x0 .
M3 ns:film.producer.films_executive_produced ?x0 .
M4 ns:film.producer.films_executive_produced ?x0 .
M5 ns:film.producer.films_executive_produced ?x0
}