What kind of vehicle does the smoke come out of?
The smoke comes out of the train.
    src        edge_attr  dst
0     0   to the left of   12
1     0  to the right of    7
2     0   to the left of    5
3     0  to the right of    8
4     1             near    9
..  ...              ...  ...
60   14    coming out of   12
61   14   to the left of   11
62   14  to the right of   10
63   14   to the left of    3
64   14   to the left of    1

[65 rows x 3 columns]