What is located on top of the table made of plastic?
The stone is on top of the table.
    src        edge_attr  dst
0     1    surrounded by    1
1     1  to the right of    4
2     1  to the right of   10
3     1  to the right of   12
4     1  to the right of    6
5     1  to the right of   11
6     2  to the right of    4
7     2  to the right of   10
8     2  to the right of   12
9     2  to the right of    5
10    2  to the right of   11
11    2  to the right of    7
12    2  to the right of    6
13    3        on top of    0
14    3  to the right of    5
15    4   to the left of    2
16    4   to the left of    1
17    5   to the left of    3
18    5   to the left of    2
19    6   to the left of    2
20    6   to the left of    1
21    6  to the right of    8
22    6  to the right of   10
23    6  to the right of   12
24    7   to the left of    2
25    7   to the left of    9
26    8   to the left of   12
27    8   to the left of    6
28    9  to the right of    7
29   10   to the left of    6
30   10   to the left of    1
31   10   to the left of    2
32   11   to the left of    1
33   11   to the left of    2
34   11  to the right of   12
35   12  to the right of    8
36   12   to the left of    6
37   12   to the left of   11
38   12   to the left of    1
39   12   to the left of    2