question: What film did a film director that played M6 executive produce and M1 , M2 , M3 , and M4 direct
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.directed_by M1 .
  ?x0 ns:film.film.directed_by M2 .
  ?x0 ns:film.film.directed_by M3 .
  ?x0 ns:film.film.directed_by M4 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x1 a ns:film.director .
  ?x1 ns:film.actor.film/ns:film.performance.character M6
  }