Which company that was acquired by M1 and acquired M4 , M5 , and M6 did M2 and M3 acquire
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 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M6
}