class_docstr: Transforms an input by replacing its number word
  
  Exmaple::
  
  {
      sentence1: Every people has two hands.
      sentence2: There are five hands with all of us.
      label: 0
  }
code: def __init__(self):
      super().__init__()
  
file_path: textflint/textflint/generation/transformation/SM/swap_num.py
imports: from ..transformation import Transformation
  from ....common.utils.num_word import _get_contradictory_hypothesis
label_desc: Use image node_id 1 to create a new SwapNum object from inherited base classes: Transformation with example: obj = SwapNum()