Is the train maroon or black?
The train is black.
   src        edge_attr  dst
0    0   to the left of    3
1    0   to the left of    5
2    1  to the right of    3
3    1  to the right of    2
4    2   to the left of    1
5    3  to the right of    0
6    3   to the left of    1
7    5  to the right of    0