Question: when did the ravens win their first super bowl
[{'answer': 'January 28 , 2001', 'provenance': [{'wikipedia_id': '29160', 'title': 'Super Bowl XXXV', 'start_paragraph_id': 1, 'start_character': 418, 'end_paragraph_id': 1, 'end_character': 437, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29160', 'title': 'Super Bowl XXXV', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 477, 'bleu_score': 0.901803001226476, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 519385337540721701}, 'section': 'Section::::Abstract.'}]}]