question: Was M0 a art director that founded M6 and was employed by M2 , M3 , M4 , and M5
query: SELECT count(*) WHERE {
  M0 a ns:film.film_art_director .
  M0 ns:organization.organization_founder.organizations_founded M6 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M5
  }