What did M0 , M1 , M2 , and M3 executive produce and a character 's actor write
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by M0 .
?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.written_by ?x1 .
?x1 ns:film.actor.film/ns:film.performance.character ?x2 .
?x2 a ns:fictional_universe.fictional_character
}