Question: who does justin timberlake play in shrek 3
[{'answer': 'Arthur Pendragon', 'provenance': [{'wikipedia_id': '903383', 'title': 'Shrek the Third', 'start_paragraph_id': 1, 'start_character': 478, 'end_paragraph_id': 1, 'end_character': 494, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]