Question: when was the first fiber optic endoscope introduced
[{'answer': '1957', 'provenance': [{'wikipedia_id': '197002', 'title': 'Endoscopy', 'start_paragraph_id': 75, 'start_character': 80, 'end_paragraph_id': 75, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::History.:Fiber optics.\n'}]}, {'provenance': [{'wikipedia_id': '197002', 'title': 'Endoscopy', 'start_paragraph_id': 75, 'start_character': 0, 'end_paragraph_id': 75, 'end_character': 605, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16507037428921810724}, 'section': 'Section::::History.:Fiber optics.\n'}]}]