Do you see both zebras and fences?
Yes, there are both a zebra and a fence.
    src        edge_attr  dst
0     1  to the right of    8
1     1  to the right of    9
2     2  to the right of    5
3     2  to the right of    7
4     3   to the left of   11
5     3   to the left of    6
6     5   to the left of    2
7     5   to the left of   10
8     5  to the right of   13
9     5   to the left of    7
10    6      eating from    8
11    6  to the right of    8
12    6      standing in    0
13    6  to the right of    9
14    6  to the right of    3
15    7   to the left of    2
16    7  to the right of    5
17    8   to the left of    1
18    8   to the left of    6
19    9   to the left of    1
20    9   to the left of    6
21   10  to the right of    5
22   11  to the right of    3
23   12      standing in    0
24   13   to the left of    5