question: Was a producer of M0 M1 's director 's employer
query: SELECT count(*) WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M0 .
  ?x1 ns:film.director.film M1
  }