Question: name the procedure used in the working of an artificial kidney
[{'answer': 'Hemodialysis', 'provenance': [{'wikipedia_id': '2400647', 'title': 'Artificial kidney', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Proposed solutions.:Artificial kidney.\n'}]}, {'provenance': [{'wikipedia_id': '2400647', 'title': 'Artificial kidney', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 786, 'bleu_score': 0.9844346099707091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14008779647762587378}, 'section': 'Section::::Proposed solutions.:Artificial kidney.\n'}]}]