Question: who plays jack frost in a touch of frost
[{'answer': 'David Jason', 'provenance': [{'wikipedia_id': '651924', 'title': 'A Touch of Frost', 'start_paragraph_id': 2, 'start_character': 17, 'end_paragraph_id': 2, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '651924', 'title': 'A Touch of Frost', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 483, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8339994193068815831}, 'section': 'Section::::Abstract.'}]}]