Was a British person that M3 was executive produced by and a film starred M1
SELECT count(*) WHERE {
?x0 a ns:film.film .
M1 a ns:people.person .
M1 ns:film.actor.film/ns:film.performance.film ?x0 .
M1 ns:film.producer.films_executive_produced M3 .
M1 ns:people.person.nationality ns:m.07ssc
}