question: Were M2 and M6 executive produced by M3 and M4 , produced by a Japanese film producer , and produced by M5
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:people.person.nationality ns:m.03_3d .
  M2 ns:film.film.executive_produced_by M3 .
  M2 ns:film.film.executive_produced_by M4 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies M5 .
  M6 ns:film.film.executive_produced_by M3 .
  M6 ns:film.film.executive_produced_by M4 .
  M6 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M6 ns:film.film.produced_by|ns:film.film.production_companies M5
  }