question: Did M4 and M7 write a film directed by M1 , M2 , and M3 and executive produce M5 and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.directed_by M1 .
  ?x0 ns:film.film.directed_by M2 .
  ?x0 ns:film.film.directed_by M3 .
  M4 ns:film.producer.films_executive_produced M5 .
  M4 ns:film.producer.films_executive_produced M6 .
  M4 ns:film.writer.film ?x0 .
  M7 ns:film.producer.films_executive_produced M5 .
  M7 ns:film.producer.films_executive_produced M6 .
  M7 ns:film.writer.film ?x0
  }