Question: when was the last time the dodgers won the national league pennant
[{'answer': '2017', 'provenance': [{'wikipedia_id': '243689', 'title': 'List of National League pennant winners', 'start_paragraph_id': 3, 'start_character': 828, 'end_paragraph_id': 3, 'end_character': 832, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]