Is the safety vest on the left side of the picture?
Yes, the safety vest is on the left of the image.
    src        edge_attr  dst
0     0   to the left of   20
1     0   to the left of    1
2     1  to the right of   18
3     1  to the right of   17
4     1   to the left of   20
..  ...              ...  ...
91   21   to the left of   17
92   21   to the left of    2
93   21   to the left of   18
94   21   to the left of   19
95   22               on    4

[96 rows x 3 columns]