What kind of clothing is gray?
The clothing is a uniform.
   src        edge_attr  dst
0    1   to the left of    9
1    4   to the left of    9
2    8   to the left of    9
3    8   on the back of    4
4    9  to the right of    8
5    9  to the right of    4
6    9  to the right of    1
7   11   to the left of   13
8   13  to the right of   11