question: Was M1 written by a character and executive produced by M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:fictional_universe.fictional_character .
  M1 ns:film.film.executive_produced_by M2 .
  M1 ns:film.film.executive_produced_by M3 .
  M1 ns:film.film.executive_produced_by M4 .
  M1 ns:film.film.written_by ?x0
  }