Who is riding a horse?
The man is riding a horse.
    src        edge_attr  dst
0     0  to the right of   15
1     1             near    3
2     2   to the left of    3
3     2   to the left of   10
4     3  to the right of    2
5     3             near    1
6     3  to the right of    6
7     3  to the right of   11
8     3             near    7
9     4  to the right of    8
10    4  to the right of   15
11    4  to the right of    5
12    4  to the right of    7
13    5   to the left of    4
14    5               on    7
15    5           riding    7
16    5          wearing    6
17    5   to the left of   15
18    5          wearing    8
19    5          wearing   11
20    6               of    5
21    6   to the left of    3
22    6   to the left of   10
23    7   to the left of   13
24    7   to the left of   15
25    7             near    3
26    7   to the left of    4
27    8   to the left of   13
28    8               of    5
29    8   to the left of    4
30    8   to the left of   15
31   10               of    3
32   10  to the right of    2
33   10  to the right of    6
34   11   to the left of    3
35   12   to the left of   15
36   13         carrying    4
37   13               in    1
38   13  to the right of    7
39   13  to the right of    8
40   13  to the right of   15
41   14               on    3
42   15  to the right of    8
43   15  to the right of    7
44   15   to the left of    4
45   15   to the left of    0
46   15               of    7
47   15   to the left of   13
48   15  to the right of    5
49   15  to the right of   12