How large are the trees behind the horse?
The trees are large.
    src        edge_attr  dst
0     0               in   11
1     0      in front of    2
2     1  to the right of   17
3     1  to the right of    7
4     2           behind    0
5     2   to the left of   15
6     2   to the left of   12
7     3           beside    0
8     3          wearing   14
9     3          wearing    1
10    3               in   11
11    3  to the right of   17
12    3  to the right of    7
13    4               of    0
14    4  to the right of   17
15    4  to the right of   16
16    5  to the right of   12
17    5   to the left of   13
18    5  to the right of   15
19    5  to the right of    8
20    5  to the right of    9
21    5  to the right of   10
22    5               of    0
23    6               of    0
24    6   to the left of   17
25    6   to the left of   16
26    7   to the left of    3
27    7   to the left of    1
28    7  to the right of   17
29    7  to the right of   16
30    8               of    0
31    8   to the left of    5
32    9               of    0
33    9   to the left of    5
34   10   to the left of    5
35   10               of    0
36   10   to the left of   13
37   12  to the right of    2
38   12   to the left of    5
39   12               of    0
40   13  to the right of   10
41   13  to the right of    5
42   13   to the left of   18
43   15   to the left of    5
44   15  to the right of    2
45   15               of    0
46   16   to the left of    4
47   16  to the right of    6
48   16   to the left of   17
49   16   to the left of    7
50   16               of    0
51   17  to the right of   16
52   17   to the left of    4
53   17   to the left of    3
54   17               of    0
55   17   to the left of    1
56   17  to the right of    6
57   17   to the left of    7
58   18  to the right of   13