What color is the door?
The door is white.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    7
2     2  to the right of    5
3     3               on    0
4     4  to the right of    0
5     4   to the left of    7
6     5   to the left of    2
7     6   to the left of    8
8     7  to the right of    0
9     7  to the right of    4
10    8               on    0
11    8  to the right of    6