Question: Which mathematician contributed most to the decidability of various algebraic groups, Anatoly Maltsev or Semyon Aranovich Gershgorin?
{'answer': 'Anatoly Ivanovich Maltsev', 'supporting_facts': [['Anatoly Maltsev', 0], ['Anatoly Maltsev', 1], ['Semyon Aranovich Gershgorin', 2]]}