Which star of M2 , M3 , M4 , and M5 was a person that M1 employed
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.actor.film/ns:film.performance.film M2 .
?x0 ns:film.actor.film/ns:film.performance.film M3 .
?x0 ns:film.actor.film/ns:film.performance.film M4 .
?x0 ns:film.actor.film/ns:film.performance.film M5 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1
}