question: What distributor of M0 and M1 employed a film producer
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M0 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M1 .
  ?x1 a ns:film.producer
  }