Question: one bit is equal to how many nibble
[{'answer': 'four', 'provenance': [{'wikipedia_id': '21150', 'title': 'Nibble', 'start_paragraph_id': 1, 'start_character': 89, 'end_paragraph_id': 1, 'end_character': 93, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21150', 'title': 'Nibble', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 0.9357502588195491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6448491342043862426}, 'section': 'Section::::Abstract.'}]}]