What is the color of the fence?
The fence is silver.
    src        edge_attr  dst
0     0               on    1
1     0               by    5
2     0  to the right of    4
3     2  to the right of    7
4     3  to the right of    7
5     4   to the left of    0
6     5               on    1
7     5   to the left of    9
8     7   to the left of    2
9     7   to the left of    3
10    9  to the right of    5