create or REPLACE function find_parent_object (obj_x VARCHAR2)
return varchar2 as parent_obj varchar2(200);
begin
    select  name
    into parent_obj
    from objects
    where level = 2 START WITH objects.name = obj_x
    CONNECT by prior objects.parent_id = object_id;

    return parent_obj;
end;

select find_parent_object(name) from objects where name = 'Томас Шелби'