Does the train to the left of the lamp look green?
Yes, the train is green.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    9
2     0  to the right of    7
3     5  to the right of    0
4     5  to the right of    9
5     5  to the right of    8
6     5  to the right of    7
7     7   to the left of    5
8     7   to the left of    8
9     7   to the left of    0
10    8  to the right of   11
11    8  to the right of    9
12    8  to the right of   10
13    8   to the left of    5
14    8  to the right of    7
15    9   to the left of    8
16    9   to the left of    5
17    9   to the left of    0
18   10   to the left of    8
19   11   to the left of    8