name a office holder whose predecessor is frederick stanley and has son named dudley gordon ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_predecessor dbr_Frederick_Stanley,_16th_Earl_of_Derby sep_dot var_uri dbo_child dbr_Dudley_Gordon,_3rd_Marquess_of_Aberdeen_and_Temair sep_dot var_uri a dbo_OfficeHolder brack_close