Was M3 acquired by M4 and M5 and acquired by a company that M1 and M2 acquired
SELECT count(*) 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 .
M3 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M3 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M4 .
M3 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M5
}