Does the airplane that is to the right of the other airplane look cloudy?
Yes, the plane is cloudy.
   src        edge_attr  dst
0    0   to the left of    2
1    0   to the left of    1
2    0   to the left of    3
3    1  to the right of    0
4    2  to the right of    0
5    3  to the right of    0