Question: when did the first male-to-female transsexual surgical transformation take place
[{'answer': '1930', 'provenance': [{'wikipedia_id': '627982', 'title': 'Sex reassignment surgery (male-to-female)', 'start_paragraph_id': 3, 'start_character': 98, 'end_paragraph_id': 3, 'end_character': 102, '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': 18157083510328347249}, 'section': 'Section::::History.\n'}]}]