Was M0 acquired by M1 , acquired by M2 , acquired by M3 , and acquired by M4
SELECT count(*) WHERE {
M0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
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
}