What color is the sky the clouds are in?
The sky is blue.
    src        edge_attr  dst
0     0          next to    3
1     0             near    3
2     0            above    2
3     1               in    6
4     1   to the left of    2
5     2  to the right of    1
6     2            under    0
7     2           behind    3
8     2               of    2
9     3               of    3
10    3             near    7
11    3             near    9
12    3             near    0
13    4   to the left of    5
14    4               of    2
15    5  to the right of    4
16    7          next to    3
17    7               on    3
18    9             near    3