Question: when did the rational dress society begin to work
[{'answer': '1881', 'provenance': [{'wikipedia_id': '5542719', 'title': 'Rational Dress Society', 'start_paragraph_id': 1, 'start_character': 58, 'end_paragraph_id': 1, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5542719', 'title': 'Rational Dress Society', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 103, 'bleu_score': 0.8852140475440831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15719273529299743223}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5542719', 'title': 'Rational Dress Society', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15719273529299743223}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5542719', 'title': 'Rational Dress Society', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The Rational Dress Society was an organisation founded in 1881 in London. It described its purpose thus:', 'The Rational Dress Society was an organisation founded in 1881 in London']}}]}, {'provenance': [{'wikipedia_id': '11558737', 'title': 'Dress', 'section': 'Section::::History.:19th century.\n', 'start_paragraph_id': 24, 'end_paragraph_id': 24, 'meta': {'evidence_span': ['he center of attention, both positive and negative. By 1881, the Rational Dress Society had formed', "Paper sewing patterns for women to sew their own dresses started to be readily available in the 1860s, when the Butterick Publishing Company began to promote them. These patterns were graded by size, which was a new innovation. The Victorian era's dresses were tight-fitting and decorated with pleats, rouching and frills. Women in the United States who were involved in dress reform in the 1850s found themselves the center of attention, both positive and negative. By 1881, the Rational Dress Society had formed"]}}]}, {'provenance': [{'wikipedia_id': '5542719', 'title': 'Rational Dress Society', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['The Rational Dress Society was an organisation founded in 1881 in London.', 'The Rational Dress Society was an organisation founded in 1881 in London']}}]}]