Question: who plays nicholas cage's dad in national treasure
[{'answer': 'Jon Voight', 'provenance': [{'wikipedia_id': '699208', 'title': 'National Treasure (film)', 'start_paragraph_id': 1, 'start_character': 294, 'end_paragraph_id': 1, 'end_character': 304, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]