class_docstr: Transforms the polarity of target by replacing its opinion words
  with antonyms provided by WordNet or adding the negation that
  pre-defined in our negative word list.
  
  Example::
  
      Original sentence: "BEST spicy tuna roll, great asian salad.
      (Target: spicy tuna roll)"
      Transformed sentence: "BAD spicy tuna roll, great asian salad."
code: def __init__(self, language="eng"):
      super().__init__()
      if language != "eng":
          raise ValueError(f"Language {language} is not available.")
      self.language = language
      self.tokenize = self.processor.tokenize
  
file_path: textflint/textflint/generation/transformation/ABSA/rev_tgt.py
imports: from copy import deepcopy
  from .absa_transformation import ABSATransformation
label_desc: Use image node_id 1 to create a new RevTgt object from inherited base classes: ABSATransformation with example: obj = RevTgt(language)