Of which color is the tractor near the post?
The tractor is green.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    1
2     0  to the right of    6
3     0             near    1
4     1               on    5
5     1  to the right of    0
6     1             near    0
7     2               in    5
8     4  to the right of    5
9     4  to the right of    0
10    5   to the left of    4
11    6               in    5
12    6   to the left of    0