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