Which kind of animal is to the right of the cart?
The animal is a horse.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    7
2     0   to the left of    9
3     0   to the left of    1
4     1  to the right of   11
5     1  to the right of    0
6     3  to the right of    0
7     4   to the left of    7
8     5               on    7
9     7  to the right of   11
10    7  to the right of    0
11    7  to the right of    4
12    9           riding    7
13    9          holding    6
14    9          wearing    6
15    9  to the right of   11
16    9          wearing    1
17    9  to the right of    0
18   11   to the left of    9
19   11   to the left of    7
20   11   to the left of    1