Question: what comes after purple belt in jiu jitsu
[{'answer': 'brown belt', 'provenance': [{'wikipedia_id': '25061050', 'title': 'Brazilian jiu-jitsu ranking system', 'start_paragraph_id': 18, 'start_character': 138, 'end_paragraph_id': 18, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Adult belt ranks.:Brown belt.\n'}]}, {'provenance': [{'wikipedia_id': '25061050', 'title': 'Brazilian jiu-jitsu ranking system', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 160, 'bleu_score': 0.9383861709333501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15592922768618001019}, 'section': 'Section::::Adult belt ranks.:Brown belt.\n'}]}]