question: Were M1 , M2 , M3 , and M4 acquired by a film distributor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_distributor .
  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
  }