Question: when will season 3 of trollhunters be released
[{'answer': '2018', 'provenance': [{'wikipedia_id': '39593077', 'title': 'Trollhunters: Tales of Arcadia', 'start_paragraph_id': 2, 'start_character': 269, 'end_paragraph_id': 2, 'end_character': 273, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]