What animals are on the hillside?
The animals are cows.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of    3
2     1  to the right of    4
3     3               on   11
4     3   to the left of    7
5     3   to the left of    6
6     3   to the left of   18
7     3  to the right of   11
8     3  to the right of    0
9     4   to the left of    1
10    6   to the left of    8
11    6  to the right of    3
12    7  to the right of    3
13    7  to the right of   11
14    7   to the left of    8
15    8  to the right of    7
16    8  to the right of    6
17    8  to the right of   18
18    8  to the right of   14
19    9   to the left of   15
20    9  to the right of   12
21   11  to the right of    0
22   11   to the left of    3
23   11   to the left of    7
24   11   to the left of   18
25   12   to the left of    9
26   14   to the left of    8
27   14               on   13
28   15  to the right of    9
29   16               on   17
30   16  to the right of   18
31   17  to the right of   18
32   18   to the left of   17
33   18  to the right of    3
34   18  to the right of   11
35   18   to the left of    8
36   18   to the left of   16