Question: which is the highest glacier in the world
[{'answer': 'Khumbu Glacier', 'provenance': [{'wikipedia_id': '1030987', 'title': 'Khumbu Glacier', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1030987', 'title': 'Khumbu Glacier', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 629, 'bleu_score': 0.8952130102105871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5858545848572602794}, 'section': 'Section::::Abstract.'}]}]