Question: when do you buy a rosca de reyes
[{'answer': 'January 6', 'provenance': [{'wikipedia_id': '13977408', 'title': 'Rosca de reyes', 'start_paragraph_id': 2, 'start_character': 29, 'end_paragraph_id': 2, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]