Were M3 and M4 acquired by a company that employed M1 and M2
SELECT count(*) WHERE {
?x0 a ns:business.employer .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
M3 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M4 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0
}