Was a screenwriter that wrote M2 , M3 , and M4 a film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 a ns:film.writer .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:film.writer.film M4
}