What is the color of the helmet the batter is wearing?
The helmet is blue.
   src        edge_attr  dst
0    0   on the back of    1
1    2          holding    8
2    2          wearing   11
3    2          wearing    4
4    2          wearing    5
5    3  to the right of    7
6    6   to the left of   11
7    7   to the left of    3
8   11  to the right of    6