Question: eight furlongs are equal to what standard length
[{'answer': '660 feet', 'provenance': [{'wikipedia_id': '11488', 'title': 'Furlong', 'start_paragraph_id': 1, 'start_character': 123, 'end_paragraph_id': 1, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '220 yards', 'provenance': [{'wikipedia_id': '11488', 'title': 'Furlong', 'start_paragraph_id': 1, 'start_character': 133, 'end_paragraph_id': 1, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'one - eighth of a mile'}, {'provenance': [{'wikipedia_id': '11488', 'title': 'Furlong', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 165, 'bleu_score': 0.9383861709333501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9178758405751227038}, 'section': 'Section::::Abstract.'}]}]