question: Did M1 edit M2 and M3 , executive produce M4 , and produce a film
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  M1 ns:film.editor.film M2 .
  M1 ns:film.editor.film M3 .
  M1 ns:film.producer.films_executive_produced M4 .
  M1 ns:film.producer.film|ns:film.production_company.films ?x0
  }