What animal does the person ride?
The person rides a horse.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    9
2     0  to the right of    1
3     1          wearing    3
4     1   to the left of    7
5     1          wearing    8
6     1           riding    6
7     1   to the left of    0
8     1               on    6
9     1          wearing    5
10    1   to the left of   11
11    2   to the left of    7
12    2               on    6
13    2   to the left of   11
14    2  to the right of    9
15    3   to the left of   11
16    5  to the right of    9
17    5   to the left of   11
18    5   to the left of    0
19    7   to the left of   11
20    7  to the right of    2
21    7  to the right of    1
22    8   to the left of   11
23    9   to the left of    0
24    9   to the left of    5
25    9   to the left of    2
26   11  to the right of    3
27   11  to the right of    1
28   11  to the right of    2
29   11  to the right of    7
30   11  to the right of    5
31   11  to the right of    8
32   11               in   12