Is the fence made of steel or wire?
The fence is made of steel.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of   13
2     0  to the right of    1
3     0   to the left of   10
4     1   to the left of   10
5     1   to the left of    7
6     1   to the left of    9
7     1   to the left of    4
8     1   to the left of   13
9     1   to the left of    0
10    3  to the right of    8
11    3               on   10
12    4  to the right of    1
13    4   to the left of    6
14    5   to the left of   14
15    5               on   13
16    6  to the right of    4
17    7  to the right of    9
18    7  to the right of    1
19    7               by    4
20    8               on   10
21    8   to the left of    3
22    9  to the right of    1
23    9   to the left of    7
24   10  to the right of    1
25   10  to the right of    0
26   10  to the right of   15
27   11  to the right of    0
28   13  to the right of    1
29   13  to the right of    0
30   14  to the right of    5
31   15   to the left of   10
32   15               on    9
33   16               on   10