question: Did a film distributor employ M2 's star and writer and employ M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_distributor .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  ?x1 ns:film.actor.film/ns:film.performance.film M2 .
  ?x1 ns:film.writer.film M2
  }