question: Were M1 , M2 , M3 , and M4 edited , directed , and produced by a person
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  M1 ns:film.film.directed_by ?x0 .
  M1 ns:film.film.edited_by ?x0 .
  M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M2 ns:film.film.directed_by ?x0 .
  M2 ns:film.film.edited_by ?x0 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M3 ns:film.film.directed_by ?x0 .
  M3 ns:film.film.edited_by ?x0 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M4 ns:film.film.directed_by ?x0 .
  M4 ns:film.film.edited_by ?x0 .
  M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }