Are there boys to the left of the people that are sitting on the barrier?
Yes, there is a boy to the left of the people.
     src        edge_attr  dst
0      0  to the right of   25
1      0       sitting on    2
2      0   to the left of   28
3      0  to the right of   40
4      0   to the left of   35
..   ...              ...  ...
383   43   to the left of   20
384   43   to the left of   31
385   43   to the left of   33
386   43   to the left of   37
387   44  to the right of    4

[388 rows x 3 columns]