class_docstr: An abstract base class representing a corpus of words.
  Define the method _get_corpus in any derived class.
docstr: Get a list of part-of-speech tagged words.
docstr_tok: ["Get","a","list","of","part-of-speech","tagged","words","."]
code: def get_pos_tagged_words(self) -> List[Tuple[str, str]]:
      """Get a list of part-of-speech tagged words."""
      raise NotImplementedError
  
imports: from abc import ABC, abstractmethod
  from typing import Dict, Iterator, List, Tuple
  import nltk
label_desc: Use image node_id 4 for calling the Corpus obj's underlying member method code with example usage: obj.get_pos_tagged_words() without return types