Question: how many episodes are there in the tv series yellowstone
[{'answer': '9', 'provenance': [{'wikipedia_id': '54060698', 'title': 'Yellowstone (American TV series)', 'start_paragraph_id': 1, 'start_character': 408, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]