code: def merge_tags(*tags):
      merged_tags = [
          [
              tuple(x) for x in zip(*sentences)
          ]  # combine tags such as ("O", "O"), ("B-ART", "B-MANA"), ...
          for sentences in zip(*tags)
      ]  # ... for each set of sentences
      return merged_tags
  
file_path: stanza/stanza/tests/ner/test_ner_utils.py
imports: import pytest
  from stanza.tests import *
  from stanza.models.common.vocab import EMPTY
  from stanza.models.ner import utils
label_desc: Use image node_id 5 for calling a global function with example usage: merge_tags() and returns: merged_tags