Question: who keeps their powers in wizards of waverly place
[{'answer': 'Justin', 'provenance': [{'wikipedia_id': '27622417', 'title': 'Wizards of Waverly Place (season 4)', 'start_paragraph_id': 1, 'start_character': 166, 'end_paragraph_id': 1, 'end_character': 172, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]