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