question: Which production company acquired M2 , acquired M3 , acquired a production company , and was acquired by M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.production_company .
  ?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
  ?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired ?x1 .
  ?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M2 .
  ?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M3 .
  ?x1 a ns:film.production_company
  }