code: def read_blankline_block(stream):
      s = ""
      while True:
          line = stream.readline()
          # End of file:
          if not line:
              if s:
                  return [s]
              else:
                  return []
          # Blank line:
          elif line and not line.strip():
              if s:
                  return [s]
          # Other line:
          else:
              s += 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 5 for calling a global function with example usage: read_blankline_block(stream) and returns: list, list, list