What is the size of the green trees?
The trees are large.
    src        edge_attr  dst
0     0  to the right of    7
1     1  to the right of    7
2     1  to the right of   15
3     2               on   15
4     3   to the left of   16
5     3   to the left of   15
6     4  to the right of    5
7     4   to the left of    6
8     4  to the right of   15
9     4  to the right of    7
10    5   to the left of    4
11    5  to the right of    7
12    5  to the right of   15
13    5   to the left of    6
14    6  to the right of   15
15    6  to the right of    5
16    6  to the right of    4
17    7   to the left of    4
18    7   to the left of    1
19    7   to the left of    5
20    7   to the left of   10
21    7   to the left of    8
22    7   to the left of    0
23    8  to the right of    7
24    9   to the left of   10
25   10  to the right of    7
26   10  to the right of    9
27   13   to the left of   15
28   13   to the left of   16
29   15  to the right of   13
30   15   to the left of    5
31   15   to the left of    4
32   15  to the right of    3
33   15   to the left of    6
34   15   to the left of    1
35   15  to the right of   16
36   16  to the right of    3
37   16  to the right of   13
38   16   to the left of   15