Question: who is the author of the song it is well with my soul
[{'answer': 'Horatio Spafford', 'provenance': [{'wikipedia_id': '3168507', 'title': 'It Is Well with My Soul', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 70, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3168507', 'title': 'It Is Well with My Soul', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 347, 'bleu_score': 0.9425437476131631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15516264530801501906}, 'section': 'Section::::Abstract.'}]}]