What is the person to the left of the pedestrians riding?
The man is riding the bicycle.
    src        edge_attr  dst
0     0  to the right of   15
1     0  to the right of    1
2     1   to the left of    0
3     3  on the front of   15
4     4   to the left of   16
5     4  to the right of   13
6     5  to the right of   10
7     5   to the left of   14
8     6   to the left of    9
9     6  to the right of   10
10    6  to the right of   11
11    9  to the right of   15
12    9  to the right of   18
13    9  to the right of    6
14   10   to the left of   14
15   10   to the left of    6
16   10   to the left of    5
17   10      in front of   15
18   10   to the left of   18
19   11           beside   12
20   11   to the left of   14
21   11   to the left of   18
22   11   to the left of    6
23   13   to the left of    4
24   14  to the right of    5
25   14  to the right of   10
26   14  to the right of   11
27   14               by   12
28   15   to the left of    9
29   15           behind   10
30   15   to the left of    0
31   16  to the right of    4
32   17               on    7
33   17      standing on    7
34   18          wearing    6
35   18           riding   13
36   18   to the left of    9
37   18  to the right of   11
38   18  to the right of   10