Was M0 a company acquired by M2 and M3 , acquired by M4 , M5 , and M6 , and acquired by M7
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
}