code: def test_empty2_bsf(self):
      self.assertEqual(parse_bsf(" \n \n"), [])
  
file_path: stanza/stanza/tests/ner/test_bsf_2_beios.py
imports: import unittest
  from stanza.utils.datasets.ner.convert_bsf_to_beios import convert_bsf, parse_bsf, BsfInfo
  import pytest
label_desc: Use image node_id 2 for calling the TestBsf obj's underlying member method code with example usage: obj.test_empty2_bsf() without return types