The train on the right side has which color?
The train is green.
    src        edge_attr  dst
0     0   to the left of    9
1     0   to the left of    3
2     0   to the left of    1
3     0   to the left of   10
4     0   to the left of   18
..  ...              ...  ...
62   19   to the left of   11
63   19   to the left of   17
64   19       walking up   10
65   19  to the right of    0
66   19   to the left of   16

[67 rows x 3 columns]