Do you see any people to the left of the child that is wearing a helmet?
No, the person is to the right of the child.
     src        edge_attr  dst
0      0   to the left of   29
1      0   to the left of   21
2      0   to the left of    3
3      0   to the left of   16
4      0   to the left of   13
..   ...              ...  ...
133   35       covered in   28
134   35       covered by   37
135   36  to the right of   19
136   37         covering   35
137   37  to the right of   19

[138 rows x 3 columns]