Question: where does blood flow from the renal veins
[{'answer': 'the inferior vena cava', 'provenance': [{'wikipedia_id': '1580594', 'title': 'Renal vein', 'start_paragraph_id': 1, 'start_character': 76, 'end_paragraph_id': 1, 'end_character': 98, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1580594', 'title': 'Renal vein', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 143, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16362855148806292806}, 'section': 'Section::::Abstract.'}]}]