question: Was M0 a person that directed M3 , M4 , and M5 , directed M6 and M7 , and wrote M2
query: SELECT count(*) WHERE {
  M0 a ns:people.person .
  M0 ns:film.director.film M3 .
  M0 ns:film.director.film M4 .
  M0 ns:film.director.film M5 .
  M0 ns:film.director.film M6 .
  M0 ns:film.director.film M7 .
  M0 ns:film.writer.film M2
  }