What is in the sky?
The shuttle is in the sky.
    src        edge_attr  dst
0     0  to the right of    7
1     1  to the right of    6
2     2   to the left of    9
3     3            above   13
4     4   to the left of   11
5     5               on   13
6     5  to the right of   11
7     6   to the left of   14
8     6   to the left of    1
9     7   to the left of    0
10    8   to the left of   11
11    9  to the right of    2
12    9               on   11
13   11  to the right of    4
14   11        on top of   13
15   11  to the right of    8
16   11   to the left of    5
17   11               in    3
18   13          holding   11
19   13         carrying   11
20   14  to the right of    6