What do the coat and the shoe have in common?
The color, both the coat and the shoe are white.
    src        edge_attr  dst
0     0   to the left of    4
1     1  to the right of   13
2     3  to the right of    6
3     3   to the left of   12
4     4  to the right of    0
5     5   to the left of   12
6     5  to the right of    6
7     6   to the left of    3
8     6   to the left of   10
9     6   to the left of    5
10    6   to the left of   12
11   10   to the left of   12
12   10  to the right of    6
13   12  to the right of   10
14   12  to the right of    3
15   12  to the right of    6
16   12  to the right of    5
17   13   to the left of    1
18   13   to the left of   14
19   14  to the right of   13