What vehicle is in front of the railroad?
The vehicle is a train.
     src        edge_attr  dst
0      0          wearing   12
1      0           beside    7
2      0  to the right of    9
3      0  to the right of    7
4      0          wearing   20
..   ...              ...  ...
96    19  to the right of    8
97    19   to the left of    9
98    20  to the right of    7
99    20  to the right of    9
100   20  to the right of   18

[101 rows x 3 columns]