Question: who was ryan dressed as on the office
[{'answer': 'Justin Bieber', 'provenance': [{'wikipedia_id': '29208337', 'title': 'Costume Contest', 'start_paragraph_id': 17, 'start_character': 20, 'end_paragraph_id': 17, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Production.:Halloween costumes.\n'}]}]