name the office holder whose alma mater is balliol college and resting place is st giles' church ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_almaMater dbr_Balliol_College,_Oxford sep_dot var_uri dbp_restingPlace dbr_St_Giles'_Church,_Horsted_Keynes sep_dot var_uri a dbo_OfficeHolder brack_close