Which actor did a company that wrote M2 and M3 employ
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.actor .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 a ns:business.employer .
?x1 ns:film.writer.film M2 .
?x1 ns:film.writer.film M3
}