name a person whose sucessor was e . m . sudarsana natchiappan and was educated at university of madras ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_almaMater dbr_University_of_Madras sep_dot var_uri dbp_successor dbr_E._M._Sudarsana_Natchiappan sep_dot var_uri a dbo_Person brack_close