question: Was M1 written by M2 , M3 , M4 , and M5 , executive produced by a film 's writer , and written by M6
query: SELECT count(*) WHERE {
  ?x0 ns:film.writer.film ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.film.executive_produced_by ?x0 .
  M1 ns:film.film.written_by M2 .
  M1 ns:film.film.written_by M3 .
  M1 ns:film.film.written_by M4 .
  M1 ns:film.film.written_by M5 .
  M1 ns:film.film.written_by M6
  }