Question: what kind of powder is used for fingerprinting
[{'answer': 'a variety of compositions', 'provenance': [{'wikipedia_id': '4611830', 'title': 'Fingerprint powder', 'start_paragraph_id': 8, 'start_character': 32, 'end_paragraph_id': 8, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Composition.\n'}]}, {'provenance': [{'wikipedia_id': '4611830', 'title': 'Fingerprint powder', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 323, 'bleu_score': 0.96188712955549, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11315733422732775934}, 'section': 'Section::::Composition.\n'}]}]