The boy is on what?
The boy is on the bike.
    src        edge_attr  dst
0     1   to the left of    7
1     2   to the left of    9
2     2   to the left of   19
3     2   to the left of   18
4     4   to the left of    6
5     4  to the right of    5
6     4  to the right of   17
7     4  to the right of   16
8     4   to the left of   11
9     4  to the right of   10
10    4  to the right of   20
11    4   to the left of   14
12    4  to the right of   13
13    5          wearing   10
14    5         carrying    9
15    5   to the left of    4
16    5   to the left of   13
17    5          wearing   16
18    5          wearing   17
19    6               on    3
20    6           riding    3
21    6  to the right of    4
22    6   to the left of   12
23    7  to the right of    1
24    8               in   21
25    9  to the right of    2
26   10   to the left of    4
27   10   to the left of   20
28   11  to the right of    4
29   12  to the right of    6
30   12  to the right of   18
31   12  to the right of   19
32   13   to the left of    4
33   13  to the right of    5
34   13  to the right of   17
35   14  to the right of    4
36   14   to the left of   18
37   14   to the left of   19
38   15               on    0
39   16   to the left of    4
40   17   to the left of   13
41   17   to the left of    4
42   18  to the right of   19
43   18  to the right of   14
44   18   to the left of   12
45   18  to the right of    2
46   19   to the left of   12
47   19  to the right of    2
48   19  to the right of   14
49   19   to the left of   18
50   19               on   18
51   20   to the left of    4
52   20  to the right of   10
53   20         crossing    2
54   20       walking on   13