Which place is it?
It is a field.
    src        edge_attr  dst
0     1   to the left of    5
1     1   to the left of   17
2     2   to the left of    9
3     2  to the right of   13
4     2   to the left of   19
5     5  to the right of    1
6     5   to the left of   17
7     7  to the right of   21
8     7   to the left of   15
9     9  to the right of    2
10   13   to the left of    2
11   15  to the right of    7
12   15  to the right of   21
13   15      in front of   16
14   16  to the right of   21
15   17  to the right of    5
16   17  to the right of    1
17   19  to the right of    2
18   21   to the left of   15
19   21   to the left of   16
20   21   to the left of    7