Question: where does the name beef stroganoff come from
[{'answer': 'in mid-19th - century Russia', 'provenance': [{'wikipedia_id': '922583', 'title': 'Beef Stroganoff', 'start_paragraph_id': 1, 'start_character': 179, 'end_paragraph_id': 1, 'end_character': 206, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '922583', 'title': 'Beef Stroganoff', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 299, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12828833480203346730}, 'section': 'Section::::Abstract.'}]}]