Which color is the car to the right of the van?
The car is purple.
     src        edge_attr  dst
0      0   to the left of    4
1      0   to the left of    7
2      0   to the left of    3
3      0  to the right of   21
4      0  to the right of   18
..   ...              ...  ...
167   28   to the left of   20
168   28   to the left of   22
169   28   to the left of   21
170   28   to the left of   23
171   29  to the right of   15

[172 rows x 3 columns]