What are the shoes on?
The shoes are on the skateboard.
     src        edge_attr  dst
0      0  to the right of   31
1      0  to the right of   28
2      0               on   15
3      1               on   15
4      1  to the right of   32
..   ...              ...  ...
191   34   to the left of   31
192   34   to the left of   27
193   34               on   19
194   34   to the left of   33
195   34   to the left of   32

[196 rows x 3 columns]