Question: what is the official language of brazil today
[{'answer': 'Portuguese', 'provenance': [{'wikipedia_id': '5272547', 'title': 'Languages of Brazil', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]