What is the airplane in?
The plane is in the air.
    src        edge_attr  dst
0     0   to the left of   13
1     0   to the left of   11
2     0  to the right of   18
3     1  to the right of   18
4     2  to the right of    7
5     4  to the right of    7
6     5  to the right of   18
7     6               in    7
8     6        flying in    7
9     6  to the right of    7
10    7   to the left of    2
11    7   to the left of    6
12    7   to the left of    4
13    8  to the right of   10
14    9  to the right of   18
15   10   to the left of    8
16   11  to the right of   18
17   11  to the right of    0
18   13  to the right of    0
19   15             near   17
20   17          next to   15
21   18   to the left of    0
22   18   to the left of   11
23   18   to the left of    1
24   18   to the left of    5
25   18   to the left of    9