class_docstr: Transforms an input by adding summaries of person and movies provided
  by csv.
  
  Example::
  
      ori: Titanic is my favorite movie.
      trans: Titanic(A seventeen-year-old aristocrat falls in love with a
      kind but poor artist aboard the
             luxurious,ill-fated R.M.S. Titanic.) is my favorite movie.
docstr: init AddEntitySummary Class
  
  :param string entity_type: add summary for which entity type
code: def __init__(self, entity_type="person", **kwargs):
      r"""
      init AddEntitySummary Class
  
      :param string entity_type: add summary for which entity type
      """
      super().__init__()
      self.entity_type = entity_type
      if entity_type == "movie":
          self.entity_dict, self.max_entity_len = sa_dict_loader(
              download_if_needed(SA_MOVIE_PATH)
          )
      elif entity_type == "person":
          self.entity_dict, self.max_entity_len = sa_dict_loader(
              download_if_needed(SA_PERSON_PATH)
          )
      else:
          raise ValueError(
              "AddEntitySummary not support type {0}, please choose entity "
              "type from movie and person".format(entity_type)
          )
  
file_path: textflint/textflint/generation/transformation/SA/add_sum.py
imports: from ..transformation import Transformation
  from ....common.settings import SA_PERSON_PATH, SA_MOVIE_PATH
  from ....common.utils.install import download_if_needed
  from ....common.utils.load import sa_dict_loader
label_desc: Use image node_id 1 to create a new AddSum object from inherited base classes: Transformation with example: obj = AddSum(entity_type)