Are there both windows and cars in the scene?
Yes, there are both a window and a car.
    src        edge_attr  dst
0     0          next to   22
1     0             near   22
2     0   to the left of   21
3     0   to the left of   13
4     0   to the left of    2
..  ...              ...  ...
56   21  to the right of    0
57   21           behind   19
58   21  to the right of   13
59   22   to the left of   16
60   22             near    0

[61 rows x 3 columns]