What's located on top of the car?
The boxes are on top of the car.
     src        edge_attr  dst
0      0  to the right of    4
1      0  to the right of    7
2      0  to the right of   16
3      0   to the left of   13
4      0   to the left of   10
..   ...              ...  ...
113   21   to the left of   10
114   21   to the left of    9
115   21   to the left of   18
116   22  to the right of    5
117   22  to the right of   19

[118 rows x 3 columns]