Question: who played old mr mcgregor in peter rabbit
[{'answer': 'Sam Neill', 'provenance': [{'wikipedia_id': '48893223', 'title': 'Peter Rabbit (film)', 'start_paragraph_id': 1, 'start_character': 298, 'end_paragraph_id': 1, 'end_character': 307, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]