code: def tagged_treebank_para_block_reader(stream):
      # Read the next paragraph.
      para = ""
      while True:
          line = stream.readline()
          # End of paragraph:
          if re.match(r"======+\s*$", line):
              if para.strip():
                  return [para]
          # End of file:
          elif line == "":
              if para.strip():
                  return [para]
              else:
                  return []
          # Content line:
          else:
              para += line
  
imports: import bisect
  import os
  import pickle
  import re
  import tempfile
  from functools import reduce
  from xml.etree import ElementTree
  from nltk.data import FileSystemPathPointer, PathPointer, SeekableUnicodeStreamReader, ZipFilePathPointer
  from nltk.internals import slice_bounds
  from nltk.tokenize import wordpunct_tokenize
  from nltk.util import AbstractLazySequence, LazyConcatenation, LazySubsequence
label_desc: Use image node_id 13 for calling a global function with example usage: tagged_treebank_para_block_reader(stream) and returns: list, list, list