What is the color of the bench the woman is on?
The bench is gray.
   src        edge_attr  dst
0    0               on    7
1    0  to the right of    4
2    2   to the left of    9
3    3               on    4
4    3               in    0
5    4   to the left of    0
6    8   to the left of    9
7    9  to the right of    8
8    9  to the right of    2