Question: who was the mountain mount mckinley officially named for
[{'answer': 'William McKinley', 'provenance': [{'wikipedia_id': '28685521', 'title': 'Denali–Mount McKinley naming dispute', 'start_paragraph_id': 1, 'start_character': 385, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28685521', 'title': 'Denali–Mount McKinley naming dispute', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 483, 'bleu_score': 0.9748377259086851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15559070149448333139}, 'section': 'Section::::Abstract.'}]}]