question: Was a company a film producer that M2 , M3 , and M4 were distributed by
query: SELECT count(*) WHERE {
  ?x0 a ns:business.employer .
  ?x0 a ns:film.producer .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M2 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M3 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M4
  }