Question: when does the earliest surviving version of baa baa black sheep date from
[{'answer': '1731', 'provenance': [{'wikipedia_id': '992283', 'title': 'Baa, Baa, Black Sheep', 'start_paragraph_id': 1, 'start_character': 104, 'end_paragraph_id': 1, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '992283', 'title': 'Baa, Baa, Black Sheep', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 677, 'bleu_score': 0.870804769319905, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14845654491250656527}, 'section': 'Section::::Abstract.'}]}]