Which color does the metal ladder have?
The ladder has yellow color.
    src        edge_attr  dst
0     0   to the left of    9
1     0  to the right of    7
2     0               on    4
3     0   to the left of   10
4     2               on    0
5     2   to the left of    9
6     2   to the left of   10
7     2  to the right of    7
8     3               on    5
9     4   to the left of   10
10    4   to the left of    9
11    4  to the right of    7
12    7   to the left of    2
13    7   to the left of    0
14    7   to the left of   10
15    7   to the left of    4
16    7   to the left of   11
17    8               in   12
18    9  to the right of    2
19    9  to the right of    0
20    9  to the right of    4
21   10  to the right of    0
22   10  to the right of    2
23   10  to the right of    4
24   10  to the right of    7
25   10  to the right of   11
26   11  to the right of    7
27   11   to the left of   10