Was M1 acquired by M2 , acquired by M3 and M4 , acquired by M0 's employer , and acquired by M5
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M3 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M4 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M5
}