What was produced by a production company that M1 and M2 were employed by
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x1 a ns:film.production_company .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person M2
}