What is the color of the water the sky is above?
The water is blue.
   src        edge_attr  dst
0    1   to the left of    9
1    3            above   10
2    4   to the left of   15
3    6  to the right of   15
4    9               of    0
5    9  to the right of    1
6   15   to the left of    6
7   15  to the right of    4