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