question: Did M2 , M3 , M4 , and M5 found a production company that was acquired by M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.production_company .
  ?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
  M2 ns:organization.organization_founder.organizations_founded ?x0 .
  M3 ns:organization.organization_founder.organizations_founded ?x0 .
  M4 ns:organization.organization_founder.organizations_founded ?x0 .
  M5 ns:organization.organization_founder.organizations_founded ?x0
  }