Question: who sings the song i hear you knocking
[{'answer': 'Smiley Lewis', 'provenance': [{'wikipedia_id': '2793346', 'title': 'I Hear You Knocking', 'start_paragraph_id': 1, 'start_character': 141, 'end_paragraph_id': 1, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2793346', 'title': 'I Hear You Knocking', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 250, 'bleu_score': 0.711889123032559, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17580005886221118650}, 'section': 'Section::::Abstract.'}]}]