Question: where does the mississippi river start and end
[{'answer': 'in northern Minnesota', 'provenance': [{'wikipedia_id': '19579', 'title': 'Mississippi River', 'start_paragraph_id': 1, 'start_character': 210, 'end_paragraph_id': 1, 'end_character': 231, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Mississippi River Delta in the Gulf of Mexico'}, {'provenance': [{'wikipedia_id': '19579', 'title': 'Mississippi River', 'start_paragraph_id': 1, 'start_character': 50, 'end_paragraph_id': 1, 'end_character': 873, 'bleu_score': 0.752361749784142, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12711511223323028374}, 'section': 'Section::::Abstract.'}]}]