Question: who does the voice of branch on trolls
[{'answer': 'Skylar Astin', 'provenance': [{'wikipedia_id': '55730547', 'title': 'Trolls: The Beat Goes On!', 'start_paragraph_id': 1, 'start_character': 395, 'end_paragraph_id': 1, 'end_character': 407, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]