Which prequel of M0 was produced by M1 and produced by a character 's employer
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x0 ns:film.film.produced_by|ns:film.film.production_companies M1 .
?x0 ns:film.film.sequel M0 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x2 a ns:fictional_universe.fictional_character
}