code: def __init__(self, content):
      self.content = content
      self.truncate_at = 16
  
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 1 to create a new MarkdownBlock object  with example: obj = MarkdownBlock(content)