Did a British screenwriter executive produce M3 , edit M1 , and edit M2
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.producer.films_executive_produced M3 .
?x0 ns:people.person.nationality ns:m.07ssc
}