Question: who did arsenal play in the champions league final
[{'answer': 'Barcelona', 'provenance': [{'wikipedia_id': '5185845', 'title': '2006 UEFA Champions League Final', 'start_paragraph_id': 1, 'start_character': 79, 'end_paragraph_id': 1, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5185845', 'title': '2006 UEFA Champions League Final', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 560, 'bleu_score': 0.944515869221328, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16904000000772831848}, 'section': 'Section::::Abstract.'}]}]