question: Were M2 and M4 employed by M3 , employed by a film distributor , and employed by M0 's employer
query: SELECT count(*) WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
  ?x1 a ns:film.film_distributor .
  M2 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M2 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  M2 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  M4 ns:people.person.employment_history/ns:business.employment_tenure.company M3
  }