Who was a British actor that M3 and M4 starred and M5 , M6 , and M7 starred
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.actor .
?x0 a ns:people.person .
?x0 ns:film.actor.film/ns:film.performance.film M3 .
?x0 ns:film.actor.film/ns:film.performance.film M4 .
?x0 ns:film.actor.film/ns:film.performance.film M5 .
?x0 ns:film.actor.film/ns:film.performance.film M6 .
?x0 ns:film.actor.film/ns:film.performance.film M7 .
?x0 ns:people.person.nationality ns:m.07ssc
}