Question: who wrote the hymn rock of ages cleft for me
[{'answer': 'Augustus Toplady', 'provenance': [{'wikipedia_id': '1864697', 'title': 'Rock of Ages (Christian hymn)', 'start_paragraph_id': 1, 'start_character': 67, 'end_paragraph_id': 1, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1864697', 'title': 'Rock of Ages (Christian hymn)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 144, 'bleu_score': 0.761655664401782, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14105173866271795986}, 'section': 'Section::::Abstract.'}]}]