Is the sky open and white?
No, the sky is open but blue.
   src        edge_attr  dst
0    0            above    2
1    0   to the left of    5
2    1      in front of    2
3    2           behind    1
4    2               in    0
5    2           behind    3
6    3               in    0
7    3      in front of    2
8    3            above    4
9    5  to the right of    0