code: def test_extract_multiple_keywords(self):
      keyword_proc = KeywordProcessor()
      keyword_proc.add_keyword("first keyword")
      keyword_proc.add_keyword("second keyword")
      sentence = "starts with a first kyword then add a secand keyword"
      extracted_keywords = [
          ("first keyword", 14, 26),
          ("second keyword", 38, 52),
      ]
      self.assertEqual(
          keyword_proc.extract_keywords(
              sentence, span_info=True, max_cost=1
          ),
          extracted_keywords,
      )
  
file_path: flashtext/test/test_extract_fuzzy.py
imports: from flashtext import KeywordProcessor
  import logging
  import unittest
label_desc: Use image node_id 9 for calling the TestExtractFuzzy obj's underlying member method code with example usage: obj.test_extract_multiple_keywords() without return types