The plane is where?
The plane is on the river.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   11
2     2  to the right of   13
3     2   to the left of    0
4     5  to the right of    7
5     5  to the right of   13
6     6   to the left of   11
7     7   to the left of   11
8     7   to the left of    5
9    10               of   11
10   10  to the right of   13
11   11  to the right of    6
12   11   to the left of    0
13   11  to the right of   13
14   11  to the right of    7
15   12  to the right of   13
16   13   to the left of    2
17   13   to the left of   10
18   13   to the left of   11
19   13   to the left of   12
20   13               on    9
21   13   to the left of    5