Question: when did sherlock holmes began working as a detective
[{'answer': 'after university', 'provenance': [{'wikipedia_id': '27159', 'title': 'Sherlock Holmes', 'start_paragraph_id': 12, 'start_character': 279, 'end_paragraph_id': 12, 'end_character': 295, 'bleu_score': 1.0, 'section': 'Section::::Fictional character biography.:Family and early life.\n'}]}, {'provenance': [{'wikipedia_id': '27159', 'title': 'Sherlock Holmes', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 393, 'bleu_score': 0.7893749432028021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15813536445019738466}, 'section': 'Section::::Fictional character biography.:Family and early life.\n'}]}]