question: Who was a actor that M4 , M5 , M6 , and M7 were directed by and M2 and M3 were written by
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.actor .
  ?x0 a ns:people.person .
  ?x0 ns:film.director.film M4 .
  ?x0 ns:film.director.film M5 .
  ?x0 ns:film.director.film M6 .
  ?x0 ns:film.director.film M7 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:film.writer.film M3
  }