question: Was M2 produced by a film editor whose employer employed M1 and distributed by M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  M2 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M3 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }