question: Was a actor that M2 employed and was founded by M1 's writer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:organization.organization_founder.organizations_founded M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2
  }