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