Do you see both a fence and a lamb there?
Yes, there are both a lamb and a fence.
    src        edge_attr  dst
0     0               of    9
1     0  to the right of    6
2     1   to the left of    2
3     1  to the right of    7
4     2  to the right of    7
5     2  to the right of    1
6     4   to the left of    8
7     4   to the left of   10
8     5  to the right of    6
9     5               of    9
10    6   to the left of    0
11    6   to the left of    5
12    7   to the left of    2
13    7   to the left of    1
14    8  to the right of    4
15   10  to the right of    4
16   11               of    9