Was M0 a company that acquired M4 , was acquired by M2 , and was acquired by M3
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.companies_acquired/ns:business.acquisition.company_acquired M4
}