What animal is in the pen?
The animal is a sheep.
    src        edge_attr  dst
0     0   to the left of   13
1     1   to the left of   12
2     1   to the left of   18
3     2  to the right of    5
4     3  to the right of   13
5     3  to the right of   12
6     3  to the right of   18
7     4   to the left of   13
8     5           behind   10
9     5   to the left of   11
10    5   to the left of    7
11    5   to the left of    2
12    6   to the left of   13
13    6               of    0
14    7   to the left of   11
15    7  to the right of    5
16    9  to the right of   13
17   10      surrounding   18
18   10      in front of    5
19   11  to the right of    5
20   11  to the right of    7
21   12   on the back of   18
22   12  to the right of    1
23   12   to the left of    3
24   13  to the right of    0
25   13   to the left of    3
26   13  to the right of    6
27   13   to the left of    9
28   13  to the right of    4
29   14               of   18
30   14   to the left of   15
31   15  to the right of   14
32   15               of   18
33   18               in   17
34   18    surrounded by   10
35   18  to the right of    1
36   18   to the left of    3