Question: when is the next steven universe episode after reunited
[{'answer': '2018', 'provenance': [{'wikipedia_id': '40975500', 'title': 'List of Steven Universe episodes', 'start_paragraph_id': 1, 'start_character': 472, 'end_paragraph_id': 1, 'end_character': 476, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]