Do you see a fence or a tennis racket?
Yes, there is a fence.
    src        edge_attr  dst
0     0               of    2
1     0   to the left of    7
2     0   to the left of   13
3     1   to the left of    7
4     3  to the right of    8
5     5   to the left of    6
6     5  to the right of    9
7     5   to the left of    7
8     5   to the left of   12
9     5   to the left of   10
10    5   to the left of   13
11    6   to the left of    7
12    6  to the right of    5
13    6   to the left of   13
14    7  to the right of    0
15    7  to the right of    1
16    7  to the right of    5
17    7  to the right of    6
18    8   to the left of    3
19    9   to the left of    5
20   10  to the right of    5
21   12  to the right of    5
22   13  to the right of    6
23   13  to the right of    5
24   13  to the right of    0