Is the sky overcast?
Yes, the sky is overcast.
    src        edge_attr  dst
0     1               of   10
1     3  to the right of    6
2     4  to the right of   12
3     4  to the right of    6
4     5  to the right of    7
5     6   to the left of    3
6     6   to the left of    4
7     6   to the left of   10
8     7   to the left of    5
9     7               of    9
10   10  to the right of    6
11   11               of    3
12   12   to the left of    4