Which person was employed by a company , was employed by M1 's distributor , and was employed by M3 's employer
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x3 .
?x1 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M1 .
?x2 a ns:business.employer .
?x3 ns:business.employer.employees/ns:business.employment_tenure.person M3
}