question: Was a company that was acquired by M2 , M3 , M4 , and M5 and was acquired by M6 and M7 M0
query: SELECT count(*) WHERE {
  M0 a ns:business.employer .
  M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2 .
  M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M3 .
  M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M4 .
  M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M5 .
  M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M6 .
  M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M7
  }