Which color is the bench?
The bench is black.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of    5
2     2   to the left of   18
3     3   to the left of   10
4     4               of   17
5     5  to the right of    0
6     6  to the right of   10
7     6  to the right of   16
8     6   to the left of   11
9    10  to the right of    3
10   10   to the left of    6
11   10  to the right of   16
12   10   to the left of   11
13   11  to the right of   10
14   11  to the right of    6
15   12  to the right of   13
16   13   to the left of   12
17   14  to the right of    0
18   16   to the left of   10
19   16   to the left of    6
20   18  to the right of    2