question: Did a British actor of M2 and M3 influence M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.character M2 .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  ?x0 ns:influence.influence_node.influenced M0 .
  ?x0 ns:people.person.nationality ns:m.07ssc
  }