Does this train look blue?
Yes, the train is blue.
    src        edge_attr  dst
0     0   to the left of    9
1     0          next to    2
2     0  to the right of    3
3     0             near    2
4     0   to the left of    6
5     2  to the right of   10
6     2             near    0
7     3   to the left of    0
8     6   to the left of    9
9     6  to the right of    0
10    9  to the right of    0
11    9  to the right of    6
12   10   to the left of    2