Which vehicle is green?
The vehicle is a tractor.
    src        edge_attr  dst
0     0  to the right of   14
1     0  to the right of    4
2     0  to the right of    8
3     1  to the right of    5
4     1  to the right of    9
..  ...              ...  ...
68   18  to the right of   16
69   18   to the left of    1
70   18  to the right of   17
71   18   to the left of    6
72   18          wearing   11

[73 rows x 3 columns]