Question: who has won the most british open golf titles
[{'answer': 'Harry Vardon', 'provenance': [{'wikipedia_id': '18541861', 'title': 'List of The Open Championship champions', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]