question: Were M2 and M4 executive produced by a person , executive produced by M3 , and executive produced by M1 's costume designer
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x1 ns:film.film_costumer_designer.costume_design_for_film M1 .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.executive_produced_by ?x1 .
  M2 ns:film.film.executive_produced_by M3 .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.executive_produced_by ?x1 .
  M4 ns:film.film.executive_produced_by M3
  }