What is pushed by the person on the left side of the picture?
The bike is pushed by the man.
    src       edge_attr  dst
0     0  to the left of    4
1     0  to the left of    7
2     0  to the left of    6
3     1  to the left of    6
4     1              on    0
..  ...             ...  ...
77   21  to the left of    6
78   21  to the left of    3
79   21  to the left of   12
80   21  to the left of   13
81   21  to the left of   16

[82 rows x 3 columns]