What is under the bike?
The grass is under the bike.
   src        edge_attr  dst
0    0   to the left of    4
1    0            above    3
2    2   to the left of    3
3    2   to the left of    7
4    3            under    0
5    3  to the right of    2
6    4  to the right of    0
7    4  to the right of    7
8    7   to the left of    4
9    7  to the right of    2