Question: who sang in the arms of an angel first
[{'answer': 'Sarah McLachlan', 'provenance': [{'wikipedia_id': '2497333', 'title': 'Angel (Sarah McLachlan song)', 'start_paragraph_id': 0, 'start_character': 7, 'end_paragraph_id': 0, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]