Is the tail both black and long?
No, the tail is long but white.
   src        edge_attr  dst
0    1   to the left of   10
1    3   to the left of   10
2    7      in front of   11
3    8  to the right of   10
4    9        on top of    1
5   10  to the right of    1
6   10   to the left of    8
7   10  to the right of    3
8   11           behind    7