Was M0 a company that was acquired by M2 , M3 , and M4
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
}