Which place is this?
It is a pen.
    src        edge_attr  dst
0     0  to the right of    3
1     1   to the left of    5
2     1  to the right of    4
3     1   to the left of    8
4     1  to the right of    3
5     1   to the left of    2
6     2  to the right of    1
7     3   to the left of    0
8     3   to the left of    1
9     3   to the left of    4
10    4   to the left of    1
11    4  to the right of    3
12    4   to the left of    5
13    4   to the left of    8
14    4               of   12
15    5  to the right of    1
16    5  to the right of    4
17    6               of   12
18    7   to the left of   14
19    8  to the right of    1
20    8  to the right of    4
21    8               of   12
22   12               in   11
23   12          holding    3
24   14               of   12
25   14  to the right of    7