What is the color of the grass on the side of the street?
The grass is green.
    src        edge_attr  dst
0     0  to the right of   20
1     1  to the right of    4
2     2               on   16
3     3  to the right of    8
4     4   to the left of    1
5     7               of    7
6     8   to the left of   19
7     8   to the left of   16
8     8   to the left of    9
9     8   to the left of    3
10    8   to the left of   13
11    9   to the left of   17
12    9  to the right of    8
13    9               on   16
14   11   on the side of    7
15   11               by    7
16   11             near   15
17   12  to the right of   16
18   13   to the left of   17
19   13  to the right of    8
20   15             near   11
21   16   to the left of   12
22   16  to the right of    8
23   16   to the left of   17
24   16  to the right of   18
25   17               on   14
26   17               on   10
27   17  to the right of   13
28   17  to the right of   16
29   17  to the right of    9
30   18   to the left of   16
31   19  to the right of    8
32   20   to the left of    0