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