Does the blue sky look clear?
Yes, the sky is clear.
    src        edge_attr  dst
0     0            below    9
1     1   to the left of   10
2     1   to the left of    9
3     1   to the left of    6
4     2  to the right of    9
5     2   to the left of    7
6     3   to the left of    6
7     6  to the right of    1
8     6  to the right of    8
9     6          next to   10
10    6             near   10
11    6  to the right of    3
12    7  to the right of    2
13    8   to the left of    6
14    8   to the left of    9
15    8   to the left of   10
16    9   to the left of    2
17    9  to the right of    1
18    9  to the right of    8
19   10  to the right of    1
20   10  to the right of    8
21   10             near    6