Who is riding the horse?
The girl is riding a horse.
    src        edge_attr  dst
0     0      in front of    9
1     0      in front of    1
2     0            below    4
3     0               on    8
4     0  to the right of    6
5     0           riding    8
6     1           behind    0
7     1             near    6
8     3  to the right of    9
9     6             near    1
10    6   to the left of    8
11    6   to the left of    0
12    7   to the left of    8
13    8  to the right of    6
14    8  to the right of    9
15    8  to the right of    7
16    9   to the left of    8
17    9   to the left of    3