What is the vehicle that is to the right of the vehicles on the left side?
The vehicle is a truck.
    src        edge_attr  dst
0     0  to the right of   17
1     0  to the right of   15
2     0  to the right of   21
3     1    parked behind   19
4     1      parked near   19
..  ...              ...  ...
84   20   to the left of   22
85   21  to the right of   17
86   21  to the right of   18
87   21   to the left of    0
88   22  to the right of   20

[89 rows x 3 columns]