What is in the sky?
The plane is in the sky.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    2
2     2   to the left of    0
3     2   to the left of    6
4     3               in    1
5     4   to the left of    6
6     5  to the right of    6
7     5  to the right of    0
8     6  to the right of    4
9     6  to the right of    2
10    6   to the left of    5
11    6   to the left of    8
12    8  to the right of    6