What is the color of the cow in the grass?
The cow is brown.
    src        edge_attr  dst
0     1   to the left of    9
1     2   to the left of    5
2     3   to the left of    6
3     3  to the right of    4
4     3   to the left of   11
5     3      in front of    4
6     4   to the left of    6
7     4   to the left of    3
8     4           behind    3
9     5  to the right of    2
10    6   to the left of   11
11    6  to the right of    3
12    6  to the right of    4
13    7   to the left of    9
14    8      in front of   11
15    8               in   12
16    9  to the right of    1
17    9  to the right of    7
18   11           behind    8
19   11  to the right of    6
20   11  to the right of    3