code: def _read_word_block(self, stream):
      words = list()
      for para in self._para_block_reader(stream):
          words.extend(self._word_tokenizer.tokenize(para))
      return words
  
imports: from collections import namedtuple
  from functools import partial, wraps
  from nltk.corpus.reader.api import CategorizedCorpusReader
  from nltk.corpus.reader.plaintext import PlaintextCorpusReader
  from nltk.corpus.reader.util import concat, read_blankline_block
  from nltk.tokenize import blankline_tokenize, sent_tokenize, word_tokenize
label_desc: Use image node_id 2 for calling the MarkdownCorpusReader obj's underlying member method code with example usage: obj._read_word_block(stream) and returns: words