Were M1 , M2 , M3 , and M4 acquired by a film 's producer
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
?x1 a ns:film.film .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M2 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M3 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M4 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0
}