Is the tree in front of the tracks?
Yes, the tree is in front of the tracks.
    src        edge_attr  dst
0     0   to the left of    4
1     1   to the left of    9
2     1      in front of    2
3     1   to the left of    2
4     1   to the left of    6
5     2   to the left of    4
6     2  to the right of    1
7     2           behind    1
8     4             near    8
9     4  to the right of    5
10    4  to the right of    9
11    4  to the right of    6
12    4  to the right of    2
13    4  to the right of    0
14    5   to the left of    4
15    6   to the left of    4
16    6  to the right of    1
17    7               in    3
18    8             near    4
19    9  to the right of    1
20    9   to the left of    4