Does that sky look cloudy and blue?
No, the sky is blue but clear.
    src        edge_attr  dst
0     1   to the left of    8
1     2   to the left of    8
2     2   to the left of    5
3     4  to the right of    8
4     5  to the right of    2
5     5   to the left of    8
6     6   to the left of    8
7     8  to the right of    2
8     8   to the left of    4
9     8  to the right of    5
10    8  to the right of    1
11    8  to the right of    6