code: def test_not_in_text_single_long_term(self):
      text = "head " * 50 + "f" * 70 + "tail " * 20
      assert "f" * 70 not in text
  
imports: import pytest
  from pytest import raises
label_desc: Use image node_id 15 for calling the TestSpecialisedExplanations obj's underlying member method code with example usage: obj.test_not_in_text_single_long_term() without return types