Question: a tributary flowing into the mississippi from the east is the
[{'answer': 'Ohio River', 'provenance': [{'wikipedia_id': '19579', 'title': 'Mississippi River', 'start_paragraph_id': 10, 'start_character': 222, 'end_paragraph_id': 10, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::Divisions.\n'}]}]