Is the fence behind the short pipe?
Yes, the fence is behind the pipe.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of    5
2     1   to the left of    3
3     1   to the left of    4
4     3  to the right of    1
5     3           behind    4
6     4               on    2
7     4  to the right of    1
8     4   to the left of    0
9     4               on    5
10    4      in front of    3
11    5   to the left of    0