Did M1 executive produce M3 and M4 , executive produce M0 's prequel , and edit M2
SELECT count(*) WHERE {
?x0 ns:film.film.sequel M0 .
M1 ns:film.editor.film M2 .
M1 ns:film.producer.films_executive_produced ?x0 .
M1 ns:film.producer.films_executive_produced M3 .
M1 ns:film.producer.films_executive_produced M4
}