Question: who did 49ers play in last super bowl
[{'answer': 'Baltimore Ravens', 'provenance': [{'wikipedia_id': '4051607', 'title': 'Super Bowl XLVII', 'start_paragraph_id': 1, 'start_character': 103, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4051607', 'title': 'Super Bowl XLVII', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 601, 'bleu_score': 0.96462321510169, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5770567658367903714}, 'section': 'Section::::Abstract.'}]}]