What do the dog and the bird have in common?
The color, both the dog and the bird are black.
   src   edge_attr  dst
0    0   on top of   10
1    0       below    8
2    4        near   10
3    5        near   10
4    8       above    0
5    9  growing on   10
6   10        near    5
7   10        near    4