What's in front of the fence?
The canopy is in front of the fence.
    src        edge_attr  dst
0     0               in    1
1     0   to the left of    8
2     0   to the left of   11
3     3  to the right of    9
4     3   to the left of    8
5     3  to the right of   10
6     4           behind   12
7     4               in    1
8     8  to the right of    0
9     8  to the right of    9
10    8  to the right of    3
11    9  to the right of   10
12    9   to the left of    8
13    9   to the left of    3
14   10   to the left of    3
15   10   to the left of    9
16   11  to the right of    0
17   12      in front of    4