code: def get_identities(self, item):
          
  
          # question
          user = self.get_sh_identity(item, self.get_field_author())
          yield user
  
          # answers
          if 'answers' in item['data']:
              for answer in item['data']['answers']:
                  # avoid "answered_by" : "This post is a wiki" corner case
                  if type(answer['answered_by']) is dict:
                      user = self.get_sh_identity(answer['answered_by'])
                      yield user
                  if 'comments' in answer:
                      for comment in answer['comments']:
                          commenter = self.get_sh_identity(comment)
                          yield commenter
docs: Return the identities from an item