Question: where was the 2017 champions league final played
[{'answer': 'Millennium Stadium', 'provenance': [{'wikipedia_id': '47098394', 'title': '2017 UEFA Champions League Final', 'start_paragraph_id': 1, 'start_character': 305, 'end_paragraph_id': 1, 'end_character': 323, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47098394', 'title': '2017 UEFA Champions League Final', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 831, 'bleu_score': 0.9399610513370861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9417866850989038756}, 'section': 'Section::::Abstract.'}]}]