Question: when is descendants 3 going to be on disney channel
[{'answer': 'mid-2019'}, {'provenance': [{'wikipedia_id': '56610454', 'title': 'Descendants 3', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 306, 'bleu_score': 0.910036530027129, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10460809767866348998}, 'section': 'Section::::Abstract.'}]}]