Question: who has won the most uefa euro cups
[{'answer': 'Germany', 'provenance': [{'wikipedia_id': '249510', 'title': 'UEFA European Championship', 'start_paragraph_id': 3, 'start_character': 78, 'end_paragraph_id': 3, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Spain', 'provenance': [{'wikipedia_id': '249510', 'title': 'UEFA European Championship', 'start_paragraph_id': 3, 'start_character': 90, 'end_paragraph_id': 3, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '249510', 'title': 'UEFA European Championship', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 520, 'bleu_score': 0.9776501033621461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16953140287208482225}, 'section': 'Section::::Abstract.'}]}]