Question: bridge over troubled water who sang it first
[{'answer': 'Simon & Garfunkel', 'provenance': [{'wikipedia_id': '634661', 'title': 'Bridge over Troubled Water (song)', 'start_paragraph_id': 1, 'start_character': 61, 'end_paragraph_id': 1, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '634661', 'title': 'Bridge over Troubled Water (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 538, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6160985124258494104}, 'section': 'Section::::Abstract.'}]}]