class_docstr: Adding the Meaningless sentences to the hypothesis and remain both premise
  and label.
  Users can use their own meaningless sentences by change the text in
  transform method
  
  exmaple:
  {
      hypothesis: I hate this book.
      premise: This book is my favorite. today is Monday.
      y: contradiction
  }
code: def __repr__(self):
      return "AddSent"
  
imports: from ..transformation import Transformation
label_desc: Use image node_id 2 for calling the AddSent obj's underlying member method code with example usage: obj.__repr__() and returns: str