question: Did M2 and M3 write and direct a film directed by and executive produced by M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.directed_by M1 .
  ?x0 ns:film.film.executive_produced_by M1 .
  M2 ns:film.director.film ?x0 .
  M2 ns:film.writer.film ?x0 .
  M3 ns:film.director.film ?x0 .
  M3 ns:film.writer.film ?x0
  }