Question: how many episodes of season 4 of the originals are there
[{'answer': '13 episodes', 'provenance': [{'wikipedia_id': '50904526', 'title': 'The Originals (season 4)', 'start_paragraph_id': 1, 'start_character': 343, 'end_paragraph_id': 1, 'end_character': 354, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '50904526', 'title': 'The Originals (season 4)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 354, 'bleu_score': 0.9114434865990401, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3636758389428098790}, 'section': 'Section::::Abstract.'}]}]