Did a person executive produce M1 , M2 , M3 , and M4 and write a sequel of M5
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:film.producer.films_executive_produced M2 .
?x0 ns:film.producer.films_executive_produced M3 .
?x0 ns:film.producer.films_executive_produced M4 .
?x0 ns:film.writer.film ?x1 .
?x1 ns:film.film.prequel M5
}