question: What was executive produced by M0 , M1 , M2 , and M3 , written by M4 and M5 , and written by M6
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.executive_produced_by M0 .
  ?x0 ns:film.film.executive_produced_by M1 .
  ?x0 ns:film.film.executive_produced_by M2 .
  ?x0 ns:film.film.executive_produced_by M3 .
  ?x0 ns:film.film.written_by M4 .
  ?x0 ns:film.film.written_by M5 .
  ?x0 ns:film.film.written_by M6
  }