question: Which character executive produced M1 and M2 and produced a film
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:fictional_universe.fictional_character .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:film.producer.films_executive_produced M2 .
  ?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
  ?x1 a ns:film.film
  }