Is the grass brown or green?
The grass is green.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    4
2     1  to the right of    9
3     1  to the right of    4
4     1  to the right of    0
5     1  to the right of    7
6     1  to the right of    6
7     3  to the right of    6
8     3  to the right of    9
9     4  to the right of    0
10    4   to the left of    1
11    6   to the left of    1
12    6  to the right of    9
13    6   to the left of    3
14    7   to the left of    1
15    9          holding   10
16    9   to the left of    1
17    9   to the left of    6
18    9   to the left of    3