Question: who won the stanley cup playoffs in 2018
[{'answer': 'Washington Capitals', 'provenance': [{'wikipedia_id': '55626926', 'title': '2018 Stanley Cup Finals', 'start_paragraph_id': 1, 'start_character': 195, 'end_paragraph_id': 1, 'end_character': 214, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55626926', 'title': '2018 Stanley Cup Finals', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 851, 'bleu_score': 0.9423758475247941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18268386856153000399}, 'section': 'Section::::Abstract.'}]}]