Which color is the helmet in the middle?
The helmet is blue.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    9
2     0   to the left of   21
3     0  to the right of    1
4     0  to the right of    5
..  ...              ...  ...
85   21  to the right of    0
86   21  to the right of   13
87   21   to the left of   19
88   21  to the right of    9
89   21  to the right of   16

[90 rows x 3 columns]