Question: where does the illinois river meet the mississippi river
[{'answer': 'Grafton', 'provenance': [{'wikipedia_id': '69301', 'title': 'Illinois River', 'start_paragraph_id': 6, 'start_character': 190, 'end_paragraph_id': 6, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::Hydrography.\n'}]}, {'provenance': [{'wikipedia_id': '69301', 'title': 'Illinois River', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 325, 'bleu_score': 0.6894682513593551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6678711122419585609}, 'section': 'Section::::Hydrography.\n'}]}]