Are there any children to the left of the green helmet?
Yes, there is a child to the left of the helmet.
     src        edge_attr  dst
0      0  to the right of   18
1      0  to the right of   21
2      0  to the right of   20
3      1  to the right of   10
4      1  to the right of   21
..   ...              ...  ...
109   20   to the left of    5
110   21  to the right of    2
111   21   to the left of    1
112   21   to the left of    0
113   21  to the right of   17

[114 rows x 3 columns]