Question: how many seasons are there of highway thru hell
[{'answer': '6', 'provenance': [{'wikipedia_id': '38136137', 'title': 'Highway Thru Hell', 'start_paragraph_id': 5, 'start_character': 107, 'end_paragraph_id': 5, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]