question: Was a cinematographer that M2 and M3 were directed by and starred a screenwriter
query: SELECT count(*) WHERE {
  ?x0 a ns:film.cinematographer .
  ?x0 a ns:film.writer .
  ?x0 ns:film.actor.film/ns:film.performance.film M2 .
  ?x0 ns:film.actor.film/ns:film.performance.film M3 .
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.director.film M3
  }