Who is sitting on the horses that are on the street?
The men are sitting on the horses.
    src        edge_attr  dst
0     1               on   13
1     1      standing on   13
2     2   to the left of    9
3     2   to the left of    3
4     3  to the right of   12
5     3  to the right of    2
6     4  to the right of   12
7     4       sitting on    5
8     4           riding    5
9     4          wearing    3
10    5      in front of    6
11    5      standing on   13
12    6           behind    5
13    7           behind   12
14    7    standing near   13
15    8          next to   13
16    8             near   13
17    8  to the right of    9
18    8  to the right of   10
19    9             near   13
20    9  to the right of   12
21    9   to the left of    8
22    9  to the right of    2
23    9          next to   13
24   10             near   13
25   10          next to   13
26   10   to the left of    8
27   12          wearing    0
28   12       sitting on    1
29   12          wearing   11
30   12          wearing    2
31   12           riding    1
32   12      in front of    7
33   12   to the left of    3
34   12   to the left of    9
35   12   to the left of    4
36   13             near   10
37   13             near    8
38   13             near    9