Is there any brown truck or fence?
Yes, there is a brown truck.
    src        edge_attr  dst
0     0  to the right of    7
1     0   to the left of    6
2     0   to the left of    1
3     1  to the right of    6
4     1  to the right of    5
5     1  to the right of    2
6     1  to the right of    0
7     2   to the left of    1
8     5   to the left of    1
9     6   to the left of    1
10    6  to the right of    0
11    7   to the left of    0