Question: when did they change the name of mount mckinley to denali
[{'answer': '2015', 'provenance': [{'wikipedia_id': '28685521', 'title': 'Denali–Mount McKinley naming dispute', 'start_paragraph_id': 3, 'start_character': 368, 'end_paragraph_id': 3, 'end_character': 372, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28685521', 'title': 'Denali–Mount McKinley naming dispute', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 615, 'bleu_score': 0.9649773185979721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12379337380724937074}, 'section': 'Section::::Abstract.'}]}]