Question: what type of metal are guns made of
[{'answer': 'steel', 'provenance': [{'wikipedia_id': '2025818', 'title': 'Gunmetal', 'start_paragraph_id': 1, 'start_character': 265, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2025818', 'title': 'Gunmetal', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 638, 'bleu_score': 0.8336058655176131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5656414133585825577}, 'section': 'Section::::Abstract.'}]}]