Question: what is the most populous borough in new york city
[{'answer': 'Brooklyn', 'provenance': [{'wikipedia_id': '645042', 'title': 'New York City', 'start_paragraph_id': 2, 'start_character': 178, 'end_paragraph_id': 2, 'end_character': 186, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]