Are there any numbers or letters that are not gold?
No, there are letters but they are gold.
     src        edge_attr  dst
0      0   to the left of    9
1      1   to the left of   18
2      2  to the right of   24
3      2   to the left of   23
4      2   to the left of   31
..   ...              ...  ...
199   32     walking with   31
200   32  to the right of   29
201   32  to the right of   27
202   32  to the right of   31
203   32  to the right of   30

[204 rows x 3 columns]