Does the sky look dull and clear?
Yes, the sky is dull and clear.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    2
2     0   to the left of    7
3     0   to the left of    3
4     0   to the left of    5
5     1  to the right of    0
6     2  to the right of    0
7     2   to the left of    3
8     3  to the right of    2
9     3  to the right of    0
10    5  to the right of    0
11    7  to the right of    0