What company acquired M4 and M5 , was acquired by M1 , and was acquired by M2 and M3
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:business.employer .
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2 .
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M3 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M4 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M5
}