Question: what is the oldest part of knott's berry farm
[{'answer': 'ghost town', 'provenance': [{'wikipedia_id': '176595', 'title': "Knott's Berry Farm", 'start_paragraph_id': 2, 'start_character': 341, 'end_paragraph_id': 2, 'end_character': 351, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]