Is the gate the same color as the building?
Yes, both the gate and the building are green.
    src        edge_attr  dst
0     0  to the right of    1
1     1   to the left of    0
2     2      in front of    6
3     2   to the left of    8
4     2  to the right of    3
5     3   to the left of    6
6     3   to the left of    2
7     5   to the left of    6
8     6           behind    2
9     6  to the right of    5
10    6  to the right of    3
11    7               of    5
12    8  to the right of    2