question: Did a Dutch film producer produce M6 , M7 , and M8 and executive produce M1 , M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:film.producer.films_executive_produced M2 .
  ?x0 ns:film.producer.films_executive_produced M3 .
  ?x0 ns:film.producer.films_executive_produced M4 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M6 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M7 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M8 .
  ?x0 ns:people.person.nationality ns:m.059j2
  }