What color is the hat?
The hat is black.
   src        edge_attr  dst
0    0  to the right of    4
1    0  to the right of    7
2    0  to the right of    3
3    0  to the right of    5
4    2   to the left of    9
5    3   to the left of    0
6    4   to the left of    0
7    5   to the left of    0
8    7   to the left of    0
9    9  to the right of    2