Were M2 and M3 founded by a film producer and founded by a screenwriter
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x1 a ns:film.producer .
M2 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders ?x1 .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x1
}