Who is riding the bicycle the surfboard is on?
The man is riding the bicycle.
     src        edge_attr  dst
0      0       walking on   19
1      0   to the left of   13
2      0  to the right of    9
3      0   to the left of   22
4      0  to the right of   19
..   ...              ...  ...
140   22  to the right of   18
141   22  to the right of    7
142   23  to the right of    9
143   23   to the left of   22
144   23  to the right of   19

[145 rows x 3 columns]