Question: who did astros play in 2017 world series
[{'answer': 'Los Angeles Dodgers', 'provenance': [{'wikipedia_id': '50635427', 'title': '2017 World Series', 'start_paragraph_id': 1, 'start_character': 265, 'end_paragraph_id': 1, 'end_character': 284, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]