What is the animal that is walking in the field?
The animal is a zebra.
    src        edge_attr  dst
0     0   to the left of    1
1     1   to the left of    9
2     1  to the right of    0
3     3  to the right of    6
4     3   to the left of   15
5     3   to the left of    9
6     4   to the left of   12
7     5       walking in   11
8     5  to the right of   12
9     6   to the left of    3
10    6   to the left of   15
11    7   to the left of   12
12    9  to the right of    3
13    9  to the right of    1
14   10   to the left of   12
15   10       walking in   11
16   12  to the right of   10
17   12  to the right of    7
18   12  to the right of    4
19   12       walking in   11
20   12   to the left of    5
21   14               on   13
22   15  to the right of    6
23   15  to the right of    3