Who is in front of the trays?
The boy is in front of the trays.
     src        edge_attr  dst
0      0   to the left of   10
1      0   to the left of   56
2      0   to the left of   31
3      0   to the left of    1
4      1  to the right of   47
..   ...              ...  ...
267   57   to the left of    9
268   57   to the left of   33
269   57  to the right of    3
270   58  to the right of   30
271   58  to the right of   48

[272 rows x 3 columns]