code: def test_get_ner(self):
      self.assertEqual(
          ([], ["O", "O", "O", "O", "O", "O", "O"]), sample.get_ner("x")
      )
      new_sample = UTCnSample({"x": ""})
      self.assertEqual(([], []), new_sample.get_ner("x"))
  
imports: import unittest
  from textflint.input.component.sample.utcn_sample import *
label_desc: Use image node_id 8 for calling the TestUTCnSample obj's underlying member method code with example usage: obj.test_get_ner() without return types