Question: who plays the voice of branch in trolls
[{'answer': 'Justin Timberlake', 'provenance': [{'wikipedia_id': '37935799', 'title': 'Trolls (film)', 'start_paragraph_id': 1, 'start_character': 312, 'end_paragraph_id': 1, 'end_character': 329, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]