Question: where do earth's large ice sheets now exist
[{'answer': 'Antarctica', 'provenance': [{'wikipedia_id': '493760', 'title': 'Ice sheet', 'start_paragraph_id': 1, 'start_character': 165, 'end_paragraph_id': 1, 'end_character': 175, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Greenland', 'provenance': [{'wikipedia_id': '493760', 'title': 'Ice sheet', 'start_paragraph_id': 1, 'start_character': 180, 'end_paragraph_id': 1, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '493760', 'title': 'Ice sheet', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 417, 'bleu_score': 0.7637722893634291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1568702726249707590}, 'section': 'Section::::Abstract.'}]}]