What color is the vehicle near the building?
The train is silver.
   src        edge_attr  dst
0    0  to the right of   10
1    0  to the right of    3
2    1  to the right of   10
3    3   to the left of    0
4    7             near   10
5   10             near    7
6   10   to the left of    1
7   10   to the left of    0