Question: when did man u last win the champions league
[{'answer': '2008', 'provenance': [{'wikipedia_id': '22384594', 'title': 'Manchester United F.C. in European football', 'start_paragraph_id': 2, 'start_character': 297, 'end_paragraph_id': 2, 'end_character': 301, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22384594', 'title': 'Manchester United F.C. in European football', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 499, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1844137053825517284}, 'section': 'Section::::Abstract.'}]}]