Who was a film producer that M2 and M3 were executive produced by and were edited by
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.producer .
?x0 a ns:people.person .
?x0 ns:film.editor.film M2 .
?x0 ns:film.editor.film M3 .
?x0 ns:film.producer.films_executive_produced M2 .
?x0 ns:film.producer.films_executive_produced M3
}