question: Was M1 executive produced by M2 and produced by a film 's star and writer
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
  ?x0 ns:film.writer.film ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.film.executive_produced_by M2 .
  M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }