Were M2 and M3 founded by a film producer and founded by a producer of M1
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x1 ns:film.producer.film|ns:film.production_company.films M1 .
M2 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders ?x1 .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x1
}