Were M1 and M6 executive produced by M2 , written by M3 , M4 , and M5 , and written by a film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
M1 ns:film.film.executive_produced_by M2 .
M1 ns:film.film.written_by ?x0 .
M1 ns:film.film.written_by M3 .
M1 ns:film.film.written_by M4 .
M1 ns:film.film.written_by M5 .
M6 ns:film.film.executive_produced_by M2 .
M6 ns:film.film.written_by ?x0 .
M6 ns:film.film.written_by M3 .
M6 ns:film.film.written_by M4 .
M6 ns:film.film.written_by M5
}