Which kind of animal is eating the grass?
The animal is a horse.
    src        edge_attr  dst
0     0               of    8
1     1               of    7
2     1  to the right of   12
3     1   to the left of    3
4     2               of    7
5     2   to the left of   11
6     2  to the right of    3
7     3   to the left of    2
8     3  to the right of    1
9     3  to the right of   12
10    3   to the left of    5
11    4               of    7
12    4  to the right of   12
13    4   to the left of   11
14    5               of    7
15    5  to the right of    3
16    7           eating    6
17    7  to the right of   10
18    7               in    9
19    7               in    6
20    7   to the left of   11
21    9               of    6
22   10               on    8
23   10   to the left of    7
24   11  to the right of    4
25   11  to the right of    2
26   11  to the right of    7
27   12   to the left of    4
28   12   to the left of    3
29   12               of    7
30   12   to the left of    1