Does the shoe look black or white?
The shoe is black.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    6
2     0   to the left of   12
3     1  to the right of    9
4     1  to the right of    7
5     2   to the left of    8
6     3   to the left of    8
7     3  to the right of    4
8     4   to the left of   11
9     4   to the left of    3
10    6   to the left of   12
11    6  to the right of    0
12    7   to the left of    1
13    7  to the right of    0
14    7   to the left of    8
15    8               on    2
16    8  to the right of    2
17    8  to the right of    3
18    8  to the right of    7
19    9   to the left of    1
20   11  to the right of    4
21   12  to the right of    0
22   12  to the right of    6