name a office holder whose predecessor is john russell and has son named amelia osborne ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_predecessor dbr_John_Russell,_4th_Duke_of_Bedford sep_dot var_uri dbo_child dbr_Amelia_Osborne,_Marchioness_of_Carmarthen sep_dot var_uri a dbo_OfficeHolder brack_close