What's on the road?
The motorcycle is on the road.
   src    edge_attr  dst
0    0           on    4
1    2       behind    5
2    2         near    9
3    3           on    5
4    4           of    5
5    5  in front of    2
6    5           on    1
7    6           of    5
8    9         near    2
9    9           by    1