What do both the cloud and the ground have in common?
The color, both the cloud and the ground are white.
    src        edge_attr  dst
0     2  to the right of    9
1     2   to the left of    7
2     7        on top of    3
3     7  to the right of   12
4     7  to the right of    2
5     9   to the left of   14
6     9   to the left of    2
7    10   to the left of   14
8    11               in    1
9    12   to the left of    7
10   14  to the right of   10
11   14  to the right of    9