What is in front of the green trees?
The sign is in front of the trees.
    src        edge_attr  dst
0     0  to the right of    8
1     0  to the right of    1
2     1   to the left of    6
3     1  to the right of    2
4     1   to the left of    0
5     1  to the right of    4
6     2           behind    8
7     2   to the left of    1
8     2      in front of    7
9     2   to the left of    8
10    3  to the right of    8
11    4           behind    8
12    4   to the left of    1
13    4   to the left of    8
14    5   to the left of    8
15    5      floating in    7
16    6  to the right of    1
17    7           behind    2
18    8  to the right of    2
19    8   to the left of    3
20    8      in front of    4
21    8   to the left of    0
22    8      in front of    2
23    8               on    1
24    8  to the right of    4
25    8  to the right of    5