Question: at its maximum extent continental glacial ice in north america extended as far south as
[{'answer': 'Missouri and Ohio Rivers', 'provenance': [{'wikipedia_id': '1178938', 'title': 'Last Glacial Maximum', 'start_paragraph_id': 36, 'start_character': 88, 'end_paragraph_id': 36, 'end_character': 112, 'bleu_score': 1.0, 'section': 'Section::::World impact.:North America.\n'}]}, {'provenance': [{'wikipedia_id': '1178938', 'title': 'Last Glacial Maximum', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 763, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11286752445990180044}, 'section': 'Section::::World impact.:North America.\n'}]}]