Is this a tall fence?
Yes, this is a tall fence.
    src        edge_attr  dst
0     0   to the left of    8
1     0   to the left of    4
2     1   to the left of    4
3     1   to the left of    3
4     1   to the left of    8
5     1   to the left of    5
6     2  to the right of    8
7     3  to the right of    1
8     4  to the right of    1
9     4  to the right of    0
10    4             near    6
11    5             near    9
12    5  to the right of    1
13    6             near    4
14    6             near    7
15    7             near    6
16    8  to the right of    0
17    8  to the right of    1
18    8   to the left of    2
19    8   to the left of    9
20    9             near    5
21    9  to the right of    8