Is the fence below the trees?
Yes, the fence is below the trees.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    1
2     1  to the right of   11
3     1  to the right of    2
4     1  to the right of    0
5     2   to the left of    6
6     2   to the left of    1
7     3   to the left of   10
8     3  to the right of    7
9     5      standing on    4
10    5               in    8
11    6            below    9
12    6  to the right of    2
13    6  to the right of    0
14    6  to the right of   11
15    7   to the left of    3
16    9            above    6
17   10  to the right of    3
18   11   to the left of    1
19   11   to the left of    6