Question: who was manager when aston villa won the european cup
[{'answer': 'Tony Barton', 'provenance': [{'wikipedia_id': '9979118', 'title': '1982 European Cup Final', 'start_paragraph_id': 4, 'start_character': 65, 'end_paragraph_id': 4, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Match.:Summary.\n'}]}, {'provenance': [{'wikipedia_id': '9979118', 'title': '1982 European Cup Final', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 195, 'bleu_score': 0.943604326170661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15003560382018111479}, 'section': 'Section::::Match.:Summary.\n'}]}]