Was M3 directed and written by a Swedish editor of M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:people.person.nationality ns:m.0d0vqn .
M3 ns:film.film.directed_by ?x0 .
M3 ns:film.film.written_by ?x0
}