Where is the airplane?
The airplane is in the sky.
    src        edge_attr  dst
0     1   to the left of   15
1     1   to the left of   10
2     4   to the left of   13
3     5               in    3
4     5   to the left of   13
5     7  to the right of   14
6     7  to the right of   17
7     7               in    3
8     7  to the right of   16
9     8  to the right of   17
10    9  to the right of   12
11   10   to the left of   12
12   10  to the right of    1
13   11               in    0
14   11  to the right of   17
15   12   to the left of    9
16   12  to the right of   10
17   13  to the right of    4
18   13  to the right of    5
19   13  to the right of   17
20   13  to the right of   14
21   13  to the right of   16
22   14   to the left of    7
23   14   to the left of   13
24   15  to the right of    1
25   16               of    5
26   16   to the left of    7
27   16   to the left of   13
28   17   to the left of    7
29   17   to the left of   11
30   17   to the left of    8
31   17   to the left of   13