Question: when does a study in scarlet take place
[{'answer': '1881', 'provenance': [{'wikipedia_id': '224500', 'title': 'A Study in Scarlet', 'start_paragraph_id': 6, 'start_character': 20, 'end_paragraph_id': 6, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Plot summary.:Part I: The Reminiscences of Watson.\n'}]}, {'provenance': [{'wikipedia_id': '224500', 'title': 'A Study in Scarlet', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 681, 'bleu_score': 0.911038652365955, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 634751641893705540}, 'section': 'Section::::Plot summary.:Part I: The Reminiscences of Watson.\n'}]}]