What's the bike on?
The bike is on the platform.
   src        edge_attr  dst
0    0  to the right of    8
1    1               on    3
2    2               on    1
3    2  to the right of    7
4    5   to the left of    6
5    6  to the right of    5
6    7   to the left of    2
7    8   to the left of    0