Question: where is the world's largest ice sheet located today greenland alaska iceland antarctica
[{'answer': 'the Antarctic', 'provenance': [{'wikipedia_id': '1164809', 'title': 'Greenland ice sheet', 'start_paragraph_id': 2, 'start_character': 54, 'end_paragraph_id': 2, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1164809', 'title': 'Greenland ice sheet', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 764, 'bleu_score': 0.6181512912050231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11556357163721353704}, 'section': 'Section::::Abstract.'}]}]