Question: where does the mississippi river empty into the gulf of mexico
[{'answer': 'the Mississippi River Delta', 'provenance': [{'wikipedia_id': '19579', 'title': 'Mississippi River', 'start_paragraph_id': 1, 'start_character': 268, 'end_paragraph_id': 1, 'end_character': 295, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19579', 'title': 'Mississippi River', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 873, 'bleu_score': 0.6513378176749061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15836184126902985754}, 'section': 'Section::::Abstract.'}]}]