Question: which colour of kryptonite would permanently remove super powers from superman
[{'answer': 'Gold', 'provenance': [{'wikipedia_id': '17390', 'title': 'Kryptonite', 'start_paragraph_id': 1, 'start_character': 376, 'end_paragraph_id': 1, 'end_character': 380, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]