Did a film producer that a prequel of M2 starred and was edited by edit M1
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x0 ns:film.editor.film ?x1 .
?x0 ns:film.editor.film M1 .
?x1 ns:film.film.sequel M2
}