What is the color of the sheep which is in front of the farm?
The sheep is brown.
    src        edge_attr  dst
0     0               in    7
1     0  to the right of    1
2     0             near    1
3     1      in front of   18
4     1          next to    0
5     1               in    7
6     1      in front of    4
7     1   to the left of    0
8     3   to the left of   17
9     4   to the left of    6
10    4   to the left of   21
11    5               in    6
12    6  to the right of    4
13    8   to the left of   15
14    8  to the right of   11
15    9               on    3
16    9   to the left of   17
17   10               in    7
18   11   to the left of    8
19   11   to the left of   15
20   11   to the left of   13
21   12   to the left of   18
22   13  to the right of   11
23   15  to the right of    8
24   15  to the right of   11
25   16           behind   18
26   17  to the right of    3
27   17  to the right of    9
28   18  to the right of   12
29   21  to the right of    4