Question: who played the young beast in beauty and the beast
[{'answer': 'Adam Mitchell', 'provenance': [{'wikipedia_id': '45230258', 'title': 'Beauty and the Beast (2017 film)', 'start_paragraph_id': 27, 'start_character': 538, 'end_paragraph_id': 27, 'end_character': 551, 'bleu_score': 1.0, 'section': 'Section::::Production.:Filming.\n'}]}]