Who is riding?
The man is riding.
    src        edge_attr  dst
0     2   to the left of    3
1     2  to the right of   10
2     2      in front of    9
3     2   to the left of    6
4     3  to the right of    2
5     3  to the right of    5
6     3  to the right of    9
7     3  to the right of   11
8     3  to the right of   13
9     5  to the right of   10
10    5   to the left of    3
11    5   to the left of    6
12    5             with    4
13    5           riding    2
14    6  to the right of    2
15    6  to the right of    5
16    6  to the right of   11
17    6  to the right of    9
18    6  to the right of   12
19    9           behind    2
20    9   to the left of    6
21    9   to the left of    3
22    9  to the right of   10
23   10   to the left of   11
24   10   to the left of    9
25   10   to the left of    5
26   10   to the left of    2
27   11   to the left of    6
28   11  to the right of   10
29   11   to the left of    3
30   12   to the left of    6
31   13   to the left of    3