docs: def _json_to_evaluation(data):
      """
      Only keep the data for online evaluations.
      Two scenarios for multiple instructors:
      1) all of the co-instructors may be evaluated online as a group,
         sharing the eval URL.
      2) each co-instructor may be evaluated individually,
         with separate eval URLs.
      """
      collection_items = data.get('collection').get('items')
      if collection_items is None:
          return None
      evaluations = []
      for item in collection_items:
          item_meta = item.get('meta')
          type = _get_item_type(item_meta)
          if type == "evaluation":
              delivery_data = item.get('data')
              if get_is_online(delivery_data):
                  evaluation = Evaluation()
                  evaluation.eval_status = \
                      get_value_by_name(delivery_data, 'status')
                  evaluation.eval_open_date = get_open_date(delivery_data)
                  evaluation.eval_close_date = get_close_date(delivery_data)
                  evaluation.eval_url = get_eval_url(item.get('links'))
                  section, instructors, completion =\
                      _get_child_items(_get_child_ids(item_meta),
                                       collection_items)
                  evaluation.section_sln = get_section_sln(section)
                  evaluation.instructor_ids = instructors
                  evaluation.is_completed = get_is_complete(completion)
                  evaluations.append(evaluation)
      return evaluations