Do you think the coat is black?
Yes, the coat is black.
   src        edge_attr  dst
0    0               of    3
1    0  to the right of    4
2    0  to the right of   10
3    1  to the right of    7
4    4   to the left of    0
5    4  to the right of    7
6    7   to the left of    1
7    7   to the left of    4
8   10   to the left of    0