Is the tree behind a snowboarder?
No, the tree is behind the skateboarder.
    src        edge_attr  dst
0     0          wearing    2
1     0          wearing    5
2     0            using    7
3     0      in front of    3
4     0               on    7
5     0          wearing    4
6     1   to the left of   12
7     1               of    0
8     2  to the right of   15
9     3           behind    0
10    4  to the right of    5
11    5   to the left of    4
12    8               of    0
13    9               of    0
14   12  to the right of   15
15   12  to the right of    1
16   13               in   14
17   15               of    0
18   15   to the left of    2
19   15   to the left of   12