code: def read_test_doc(doc):
      sentences = [x.strip().split("\n") for x in doc.split("\n\n")]
      return sentences
  
file_path: stanza/stanza/tests/tokenization/test_prepare_tokenizer_treebank.py
imports: import pytest
  import stanza
  from stanza.tests import *
  from stanza.utils.datasets import prepare_tokenizer_treebank
label_desc: Use image node_id 4 for calling a global function with example usage: read_test_doc(doc) and returns: sentences