Question: who has the most acc championships in football
[{'answer': 'Clemson', 'provenance': [{'wikipedia_id': '3420326', 'title': 'Atlantic Coast Conference football champions', 'start_paragraph_id': 6, 'start_character': 36, 'end_paragraph_id': 6, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Early era.\n'}]}]