question: What person did a film star and a sequel of M1 star
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
  ?x0 ns:film.actor.film/ns:film.performance.film ?x2 .
  ?x1 ns:film.film.prequel M1 .
  ?x2 a ns:film.film
  }