Who is riding?
The boy is riding.
    src        edge_attr  dst
0     0   to the left of   10
1     0            under   18
2     0            below   18
3     1  to the right of    6
4     2   to the left of   12
5     2   to the left of   18
6     2   to the left of   17
7     2   to the left of    4
8     4  to the right of    2
9     4   to the left of    7
10    6   to the left of    1
11    6   to the left of    9
12    7  to the right of    4
13    7  to the right of   14
14    7  to the right of   19
15    9  to the right of    6
16   10  to the right of   19
17   10  to the right of    0
18   11  to the right of   12
19   11   to the left of   15
20   11   to the left of   13
21   12   to the left of   11
22   12  to the right of    2
23   12   to the left of   15
24   12   to the left of   13
25   13   to the left of   15
26   13  to the right of   12
27   13  to the right of   11
28   14   to the left of    7
29   14  to the right of   19
30   15  to the right of   12
31   15  to the right of   13
32   15  to the right of   11
33   17  to the right of    2
34   18           riding   20
35   18          wearing   17
36   18       sitting on    0
37   18  to the right of    2
38   18          wearing   19
39   18          wearing   16
40   19   to the left of    7
41   19   to the left of   14
42   19   to the left of   10