question: What was executive produced by a director of M0 , M1 , M2 , and M3 and written by a film director
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x0 ns:film.film.written_by ?x2 .
  ?x1 ns:film.director.film M0 .
  ?x1 ns:film.director.film M1 .
  ?x1 ns:film.director.film M2 .
  ?x1 ns:film.director.film M3 .
  ?x2 a ns:film.director
  }