Question: how many seasons are there of doctor blake mysteries
[{'answer': '5', 'provenance': [{'wikipedia_id': '38677144', 'title': 'List of The Doctor Blake Mysteries episodes', 'start_paragraph_id': 5, 'start_character': 83, 'end_paragraph_id': 5, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Episodes.:Telemovies.\n'}]}]