What animal does the horse look at?
The horse looks at the zebra.
    src        edge_attr  dst
0     0   to the left of   14
1     0  to the right of    9
2     0   to the left of   17
3     1   to the left of   14
4     1  to the right of    9
5     2  to the right of   15
6     2  to the right of    6
7     4  to the right of   15
8     4  to the right of    6
9     4               on   15
10    6   to the left of   17
11    6   to the left of   14
12    6   to the left of    4
13    6   to the left of    2
14    9   to the left of    0
15    9   to the left of   13
16    9   to the left of   18
17    9   to the left of    1
18   13  to the right of    9
19   13  to the right of   18
20   14  to the right of   15
21   14  to the right of    6
22   14  to the right of    1
23   14  to the right of    0
24   15       looking at    4
25   15            above   16
26   15   to the left of   14
27   15   to the left of    2
28   15   to the left of    4
29   15   to the left of   17
30   17  to the right of   15
31   17  to the right of    0
32   17  to the right of    6
33   18  to the right of    9
34   18   to the left of   13