What prequel of M0 did M1 , M2 , and M3 executive produce
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.executive_produced_by M2 .
?x0 ns:film.film.executive_produced_by M3 .
?x0 ns:film.film.sequel M0
}