What is on the shelf on the right side?
The lamp is on the shelf.
    src        edge_attr  dst
0     0            below    3
1     2  to the right of    6
2     3            above    0
3     4  to the right of    6
4     4  to the right of   10
5     5  to the right of    6
6     5  to the right of    9
7     6   to the left of    9
8     6   to the left of    5
9     6   to the left of   11
10    6   to the left of    8
11    6   to the left of    4
12    6   to the left of    2
13    8  to the right of   10
14    8  to the right of    6
15    9   to the left of    5
16    9               on    0
17    9  to the right of    6
18    9               on    8
19   10   to the left of    8
20   10               on    0
21   10   to the left of    4
22   11  to the right of    6