What do the racket and the fence have in common?
The color, both the racket and the fence are black.
   src        edge_attr  dst
0    0  to the right of    7
1    1  to the right of    2
2    1  to the right of    3
3    2  to the right of    3
4    2   to the left of    1
5    3   to the left of    1
6    3   to the left of    2
7    4  to the right of    5
8    5   to the left of    4
9    7   to the left of    0