What is in the sky?
The clouds are in the sky.
    src        edge_attr  dst
0     0  to the right of    8
1     0  to the right of    3
2     1  to the right of   11
3     1               in    5
4     2   to the left of   13
5     3  to the right of   12
6     3  to the right of   11
7     3   to the left of    0
8     3  to the right of    4
9     4  to the right of   12
10    4   to the left of    3
11    4  to the right of   11
12    6  to the right of   10
13    8         boarding    7
14    8   to the left of    0
15    9   to the left of   12
16   10               of   11
17   10   to the left of    6
18   11   to the left of    4
19   11   to the left of    1
20   11   to the left of    3
21   12   to the left of    3
22   12  to the right of    9
23   12   to the left of    4
24   13  to the right of    2
25   14               on   13