The fence in front of the building has what color?
The fence is white.
   src        edge_attr  dst
0    0  to the right of    3
1    1           behind    2
2    1  to the right of    7
3    2      in front of    1
4    3   to the left of    4
5    3   to the left of    0
6    4               of    0
7    4  to the right of    3
8    6               of    0
9    7   to the left of    1