question: Who was a actor that M2 and M3 were written by and M4 and M5 starred
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.actor .
  ?x0 a ns:people.person .
  ?x0 ns:film.actor.film/ns:film.performance.film M4 .
  ?x0 ns:film.actor.film/ns:film.performance.film M5 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:film.writer.film M3
  }