What is in front of the green trees?
The train is in front of the trees.
    src        edge_attr  dst
0     0  to the right of   14
1     1   to the left of   16
2     1  to the right of   15
3     1   to the left of   21
4     1  to the right of    6
..  ...              ...  ...
74   21   to the left of   16
75   21  to the right of   18
76   21  to the right of    1
77   21  to the right of    6
78   21  to the right of    4

[79 rows x 3 columns]