question: Which star of M0 , M1 , M2 , and M3 was a film director 's male actor
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.character ?x1 .
  ?x0 ns:film.actor.film/ns:film.performance.film M0 .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:film.actor.film/ns:film.performance.film M2 .
  ?x0 ns:film.actor.film/ns:film.performance.film M3 .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x1 a ns:film.director
  }