What was a film that M1 wrote and M2 's employer wrote
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.written_by ?x1 .
?x0 ns:film.film.written_by M1 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person M2
}