Did M1 write a prequel of M0 , executive produce M2 , and executive produce M3 and M4
SELECT count(*) WHERE {
?x0 ns:film.film.sequel M0 .
M1 ns:film.producer.films_executive_produced M2 .
M1 ns:film.producer.films_executive_produced M3 .
M1 ns:film.producer.films_executive_produced M4 .
M1 ns:film.writer.film ?x0
}