What kind of animal are the trees behind of?
The trees are behind the horse.
    src        edge_attr  dst
0     0  to the right of   11
1     0  to the right of   14
2     0  to the right of    9
3     1  to the right of   11
4     1  to the right of   14
5     1  to the right of    9
6     2  to the right of    3
7     2  to the right of    5
8     2  to the right of   14
9     2  to the right of   12
10    2   to the left of    4
11    2   to the left of   15
12    2           behind    8
13    2  to the right of    6
14    3   to the left of    2
15    3  to the right of    5
16    4  to the right of   12
17    4  to the right of   14
18    4  to the right of    2
19    5               of    8
20    5   to the left of   12
21    5   to the left of    3
22    5   to the left of    2
23    5   to the left of   14
24    5   to the left of    6
25    6   to the left of    2
26    6  to the right of    5
27    8   to the left of   10
28    8  to the right of   16
29    8      in front of    2
30    9   to the left of    1
31    9   to the left of   13
32    9   to the left of    0
33   10  to the right of    8
34   11   to the left of   13
35   11   to the left of    0
36   11   to the left of    1
37   12   to the left of    4
38   12  to the right of    5
39   12   to the left of    2
40   12   to the left of   15
41   13  to the right of    9
42   13  to the right of   11
43   13  to the right of   14
44   14   to the left of    4
45   14   to the left of   15
46   14   to the left of   13
47   14   to the left of    2
48   14  to the right of    5
49   14   to the left of    1
50   14   to the left of    0
51   15  to the right of   14
52   15  to the right of    2
53   15  to the right of   12
54   16   to the left of    8