Question: which team has won the uefa champions league the most times
[{'answer': 'Spanish side Real Madrid', 'provenance': [{'wikipedia_id': '19012416', 'title': 'List of UEFA club competition winners', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19012416', 'title': 'List of UEFA club competition winners', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 496, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4028481813695407452}, 'section': 'Section::::Abstract.'}]}]