code: def test_position_bias(doc_long_en):
      result1 = kt.textrank(doc_long_en, position_bias=False)
      result2 = kt.textrank(doc_long_en, position_bias=True)
      assert len(result1) > 0 and len(result2) > 0
      assert result1 != result2
  
file_path: textacy/tests/extract/keyterms/test_textrank.py
imports: import pytest
  import textacy
  from textacy.extract import keyterms
label_desc: Use image node_id 7 for calling a global function with example usage: test_position_bias(doc_long_en) without return types