SQL & PL/SQL :: How To Select Data From REF Within REF (object Types)

how to display REFS from within a REF. I've not used my exact code here as its quite a big file so i've made a similar scenario to get me point across. Here is the code first:

1 CREATE OR REPLACE TYPE object1 AS OBJECT (
2 object_id NUMBER(5),
3 object_name varchar2(10),
4 object_added DATE);
5 /
6 CREATE TABLE object1_tab OF object1 (object_id PRIMARY KEY);
7 /
8 INSERT INTO object1_tab
9 VALUES (1,'Daniel',sysdate);
10 /
11 show errors;
12 /
13 CREATE OR REPLACE TYPE object2 AS OBJECT (
14 object_id NUMBER(5),
15 object_job varchar2(10),
16 object1_ref REF object1 );
17 /
18 CREATE TABLE object2_tab OF object2(object_id PRIMARY KEY);
19 /
20 INSERT INTO object2_tab
21 VALUES (1,'Developer',(SELECT REF(p) FROM object1_tab P
22 WHERE VALUE(p).object_id = &object_id));
23 /
24 select DEREF(object1_ref)
25 FROM object2_tab;
26 /
27 CREATE OR REPLACE TYPE object3 AS OBJECT (
28 object_id NUMBER(5),
29 object_location VARCHAR2(20),
30 object2_ref REF object2);
31 /
32 CREATE TABLE object3_tab OF object3 (object_id PRIMARY KEY);
33 /
34 INSERT INTO object3_tab
35 VALUES (1,'New York',(SELECT REF(p) FROM object2_tab P 36 WHERE VALUE(p).object_id = &object_id));
37 /
38 show errors;
39 /
40 select object_id,object_location,DEREF(object2_ref)
41 FROM object3_tab;
42 /

As yot can see in the code each object refernces from the previous. When I view the DEREF in the third table (object3_tab) i get the following output:

OBJECT_ID OBJECT_LOCATION DEREF(OBJECT2_REF)
--------- -------------------- ----------------------------------
1 New York [SANTA.OBJECT2]

Contained within the object2 is the following:

SANTA.OBJECT2(1,'Developer','oracle.sql.REF@c4cb4aa6')

How would i view the ref for object1 within object3? I will also need to be able to verify the data in these REF in the new table they are used in.