Who did M1 employ and a production company acquired by M3 employ
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x1 a ns:film.production_company .
?x1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M3
}