Question: when were x rays first used in medicine
[{'answer': '11 January 1896', 'provenance': [{'wikipedia_id': '34197', 'title': 'X-ray', 'start_paragraph_id': 18, 'start_character': 101, 'end_paragraph_id': 18, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::History.:Advances in radiology.\n'}]}, {'provenance': [{'wikipedia_id': '34197', 'title': 'X-ray', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 481, 'bleu_score': 0.8696484887940711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 805695267576044572}, 'section': 'Section::::History.:Advances in radiology.\n'}]}]