Did a British film director write M3 's sequel and write M1
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x0 ns:film.writer.film ?x1 .
?x0 ns:film.writer.film M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 ns:film.film.prequel M3
}