Did a British actor direct M2 , M3 , and M4
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:film.director.film M2 .
?x0 ns:film.director.film M3 .
?x0 ns:film.director.film M4 .
?x0 ns:people.person.nationality ns:m.07ssc
}