Question: when do the 2018 stanley cup playoffs end
[{'answer': 'June 7 , 2018', 'provenance': [{'wikipedia_id': '54302525', 'title': '2018 Stanley Cup playoffs', 'start_paragraph_id': 1, 'start_character': 189, 'end_paragraph_id': 1, 'end_character': 202, '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': 11086049114276630442}, 'section': 'Section::::Abstract.'}]}]