Question: when's the last time the washington capitals were in the stanley cup finals
[{'answer': 'the 2017 -- 18 season'}, {'provenance': [{'wikipedia_id': '11233387', 'title': 'List of Washington Capitals seasons', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 458, 'bleu_score': 0.7826202258610631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1204697360806375228}, 'section': 'Section::::Abstract.'}]}]