Question: who is the mayor of saint john nb
[{'answer': 'Don Darling', 'provenance': [{'wikipedia_id': '2297043', 'title': 'Mayor of Saint John, New Brunswick', 'start_paragraph_id': 3, 'start_character': 333, 'end_paragraph_id': 3, 'end_character': 344, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]