What is the color of the trains to the left of the other train?
The trains are red.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    5
2     1   to the left of    5
3     1   to the left of    9
4     1  to the right of    0
5     1   to the left of    2
6     2  to the right of    3
7     2  to the right of    5
8     2  to the right of    1
9     2   to the left of   10
10    3   to the left of    2
11    3  to the right of    4
12    3   to the left of   10
13    4   to the left of    3
14    5   to the left of    2
15    5  to the right of    0
16    5   to the left of    9
17    5  to the right of    1
18    7   to the left of   10
19    7            above    8
20    8             near    9
21    8            below   10
22    9             near   10
23    9  to the right of    1
24    9  to the right of    5
25    9             near    8
26    9            below   10
27   10             near    9
28   10  to the right of    2
29   10  to the right of    7
30   10  to the right of    3