name the person whose mother name is aleksander antoni sapieha and has a son named izabella elżbieta czartoryska ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_parent dbr_Aleksander_Antoni_Sapieha sep_dot var_uri dbo_child dbr_Izabella_Elżbieta_Czartoryska sep_dot var_uri a dbo_Person brack_close