Question: who wrote the song if you don't know me by now
[{'answer': 'Kenny Gamble', 'provenance': [{'wikipedia_id': '5472884', 'title': "If You Don't Know Me by Now", 'start_paragraph_id': 1, 'start_character': 51, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Leon Huff', 'provenance': [{'wikipedia_id': '5472884', 'title': "If You Don't Know Me by Now", 'start_paragraph_id': 1, 'start_character': 68, 'end_paragraph_id': 1, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5472884', 'title': "If You Don't Know Me by Now", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 293, 'bleu_score': 0.8638586117686091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16572232658797270082}, 'section': 'Section::::Abstract.'}]}]