Is there a bird in the dark air?
No, there is an airplane in the air.
    src        edge_attr  dst
0     0               in    7
1     0      in front of   11
2     3  to the right of   13
3     5  to the right of    6
4     6   to the left of    5
5     8  to the right of   14
6    10   on the side of    2
7    11           behind    0
8    12           behind    2
9    13   to the left of    3
10   14   to the left of    8