Do the words look white?
No, the words are black.
   src        edge_attr  dst
0    2  to the right of    8
1    2               on   10
2    2   to the left of   10
3    3               in    6
4    4   to the left of    8
5    8   to the left of    2
6    8  to the right of    4
7   10  to the right of    2