Was a film 's producer M0 's star 's employer
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:film.producer.film|ns:film.production_company.films ?x2 .
?x1 ns:film.actor.film/ns:film.performance.film M0 .
?x2 a ns:film.film
}