What is the color of the fence?
The fence is silver.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of    2
2     0  to the right of    8
3     1          next to    4
4     1             near    4
5     2  to the right of    8
6     2  to the right of    6
7     2           behind    5
8     2  to the right of   12
9     2   to the left of    0
10    4             near    1
11    5      in front of    8
12    5           behind   12
13    5      in front of    6
14    6  to the right of   12
15    6   to the left of    0
16    6  to the right of    8
17    6   to the left of    2
18    8   to the left of    0
19    8   to the left of    6
20    8   to the left of    2
21    8  to the right of   12
22    9   to the left of   10
23    9   to the left of   11
24   10  to the right of   11
25   10  to the right of    9
26   11  to the right of    9
27   11   to the left of   10
28   12   to the left of    2
29   12   to the left of    6
30   12   to the left of    8
31   12      in front of    5