question: Did a female person write M1 and M2 , direct M4 and M5 , and direct M6
query: SELECT count(*) WHERE {
  ?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.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:people.person.gender ns:m.02zsn
  }