What are the vehicles that are in front of the white building?
The vehicles are cars.
    src        edge_attr  dst
0     0   to the left of    4
1     1  to the right of    4
2     1  to the right of    9
3     1   to the left of   10
4     2  to the right of    4
..  ...              ...  ...
59   17  to the right of    5
60   18      in front of   19
61   18   to the left of    4
62   19           behind   18
63   19   to the left of    8

[64 rows x 3 columns]