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