question: Which British actor of M1 did M2 's sequel star
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.character M1 .
  ?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  ?x1 ns:film.film.prequel M2
  }