Was a employer of M0 and M1 acquired by M2
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2
}