Question: who has won the charity shield the most
[{'answer': 'Manchester United', 'provenance': [{'wikipedia_id': '29716551', 'title': 'List of FA Community Shield matches', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]