Question: who is playing in stanley cup finals 2018
[{'answer': 'the Washington Capitals', 'provenance': [{'wikipedia_id': '54302525', 'title': '2018 Stanley Cup playoffs', 'start_paragraph_id': 1, 'start_character': 208, 'end_paragraph_id': 1, 'end_character': 231, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Vegas Golden Knights', 'provenance': [{'wikipedia_id': '54302525', 'title': '2018 Stanley Cup playoffs', 'start_paragraph_id': 1, 'start_character': 295, 'end_paragraph_id': 1, 'end_character': 319, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54302525', 'title': '2018 Stanley Cup playoffs', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 363, 'bleu_score': 0.909992945383792, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12555917396501636709}, 'section': 'Section::::Abstract.'}]}]