What color is the cow?
The cow is brown.
    src        edge_attr  dst
0     1               of    4
1     1   to the left of    9
2     1  to the right of    5
3     2               of    4
4     2  to the right of    5
5     2   to the left of   10
6     4  to the right of    5
7     5               of    4
8     5   to the left of    2
9     5   to the left of    1
10    5   to the left of    7
11    5   to the left of    4
12    5   to the left of    9
13    6               of    4
14    7               of    4
15    7   to the left of   10
16    7  to the right of    5
17    8               of    4
18    9  to the right of    1
19    9  to the right of    5
20    9               on    4
21    9   to the left of   10
22   10  to the right of    2
23   10  to the right of    7
24   10  to the right of    9
25   11               of    4