Who is wearing the knee pads?
The boy is wearing knee pads.
    src        edge_attr  dst
0     0   to the left of   13
1     0               on   21
2     1  to the right of   21
3     2   to the left of   24
4     2   to the left of   23
..  ...              ...  ...
65   29  to the right of   24
66   29   to the left of   11
67   29  to the right of    6
68   29  to the right of    2
69   30  to the right of   17

[70 rows x 3 columns]