Question: who sings knock three times on the ceiling if you want me
[{'answer': 'L. Russell Brown', 'provenance': [{'wikipedia_id': '758416', 'title': 'Knock Three Times', 'start_paragraph_id': 2, 'start_character': 28, 'end_paragraph_id': 2, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Irwin Levine', 'provenance': [{'wikipedia_id': '758416', 'title': 'Knock Three Times', 'start_paragraph_id': 2, 'start_character': 49, 'end_paragraph_id': 2, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '758416', 'title': 'Knock Three Times', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 502, 'bleu_score': 0.8649129143223291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14722268444200945871}, 'section': 'Section::::Abstract.'}]}]