What color are the trees beside the train?
The trees are brown.
    src        edge_attr  dst
0     0           beside    1
1     0             near    1
2     0  to the right of    1
3     0  to the right of    3
4     0  to the right of    2
5     0          next to    1
6     0  to the right of    4
7     1   to the left of    8
8     1   to the left of    0
9     1            above    6
10    1             near    0
11    2   to the left of    7
12    2   to the left of    0
13    2   to the left of    8
14    3   to the left of    7
15    3   to the left of    0
16    4    coming out of    1
17    4   to the left of    0
18    4      coming from    1
19    5  to the right of    9
20    7  to the right of    3
21    7  to the right of    2
22    8  to the right of    1
23    8  to the right of    2
24    9   to the left of    5