Question: when was the first gender reassignment surgery performed
[{'answer': 'Lili Elbe', 'provenance': [{'wikipedia_id': '627982', 'title': 'Sex reassignment surgery (male-to-female)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '627982', 'title': 'Sex reassignment surgery (male-to-female)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 316, 'bleu_score': 0.5553808209537511, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2513485897672272352}, 'section': 'Section::::History.\n'}]}]