Question: who brought castiel back to life in season 5
[{'answer': "Jack , Lucifer 's son", 'provenance': [{'wikipedia_id': '19533905', 'title': 'Castiel (Supernatural)', 'start_paragraph_id': 59, 'start_character': 26, 'end_paragraph_id': 59, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Plot.:Reborn again.\n'}]}]