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