Did M3 , M5 , and M6 direct a film executive produced by M1 and M2 and write M4
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.executive_produced_by M2 .
M3 ns:film.director.film ?x0 .
M3 ns:film.writer.film M4 .
M5 ns:film.director.film ?x0 .
M5 ns:film.writer.film M4 .
M6 ns:film.director.film ?x0 .
M6 ns:film.writer.film M4
}