Is the train near the train tracks gray or red?
The train is gray.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of    8
2     1      in front of    6
3     1   to the left of    4
4     1             near    3
5     1               on    3
6     2   to the left of   12
7     3             near    1
8     3             near    6
9     4  to the right of    1
10    5  to the right of   13
11    5  to the right of    9
12    6             near    3
13    6           behind    1
14    7  to the right of    9
15    8  to the right of    9
16    8  to the right of   13
17    8          leaving    1
18    8  to the right of    0
19    8           inside    1
20    9   to the left of   14
21    9   to the left of    8
22    9   to the left of    7
23    9   to the left of    5
24   12  to the right of    2
25   13   to the left of    5
26   13   to the left of   14
27   13   to the left of    8
28   14  to the right of    0
29   14  to the right of    9
30   14  to the right of   13