name the office holder whose predecessor is philip cunliffe-lister and successor is duncan sandys ?
SELECT DISTINCT var_uri where brack_open var_uri dbp_predecessor dbr_Philip_Cunliffe-Lister,_1st_Earl_of_Swinton sep_dot var_uri dbp_successor dbr_Duncan_Sandys sep_dot var_uri a dbo_OfficeHolder brack_close