Were M1 , M2 , M3 , M4 , M5 , M6 , and M7 acquired by a company
SELECT count(*) WHERE {
?x0 a ns:business.employer .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M2 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M3 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M4 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M5 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M6 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M7 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0
}