Question: how many episodes are there of the originals season 5
[{'answer': '13', 'provenance': [{'wikipedia_id': '55819283', 'title': 'The Originals (season 5)', 'start_paragraph_id': 1, 'start_character': 377, 'end_paragraph_id': 1, 'end_character': 379, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]