Did a Swedish person play M2 and M3 and play M4
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.actor.film/ns:film.performance.character M2 .
?x0 ns:film.actor.film/ns:film.performance.character M3 .
?x0 ns:film.actor.film/ns:film.performance.character M4 .
?x0 ns:people.person.nationality ns:m.0d0vqn
}