Which place is it?
It is a river.
    src        edge_attr  dst
0     0   to the left of    3
1     0  to the right of    4
2     1   to the left of   12
3     1   to the left of    6
4     2   to the left of   14
5     3   to the left of    8
6     3  to the right of    0
7     4   to the left of    0
8     6  to the right of    1
9     8  to the right of    3
10    9               in   13
11    9  to the right of   15
12    9  to the right of   18
13    9  to the right of   20
14    9  to the right of   17
15   11   to the left of   19
16   12               in    3
17   12  to the right of    1
18   12               in    1
19   12      swimming in   19
20   12      swimming in    4
21   14  to the right of    2
22   15               in   13
23   15   to the left of    9
24   15  to the right of   16
25   16   to the left of   15
26   16       growing in    5
27   16   to the left of   20
28   17   to the left of    9
29   17  to the right of   20
30   18   to the left of    9
31   19  to the right of   11
32   20  to the right of   16
33   20   to the left of   17
34   20   to the left of    9