question: Was a film executive produced by M1 , M2 , and M3 , executive produced by M4 , and executive produced by a film producer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x0 ns:film.film.executive_produced_by M1 .
  ?x0 ns:film.film.executive_produced_by M2 .
  ?x0 ns:film.film.executive_produced_by M3 .
  ?x0 ns:film.film.executive_produced_by M4 .
  ?x1 a ns:film.producer
  }