Question: Who did more ring theory, Cahit Arf or Sind ibn Ali?
{'answer': 'Cahit Arf', 'supporting_facts': [['Cahit Arf', 0], ['Cahit Arf', 1], ['Sind ibn Ali', 0], ['Sind ibn Ali', 1], ['Sind ibn Ali', 2], ['Sind ibn Ali', 3], ['Sind ibn Ali', 4]]}