What do the bird and the cap have in common?
The color, both the bird and the cap are white.
   src        edge_attr  dst
0    0   to the left of   11
1    0   to the left of    5
2    5  to the right of    0
3    6   to the left of   10
4   10  to the right of    6
5   11  to the right of    0