[Chapter 28][p.332] jb2.query("~country_live.isin(@countries_to_remove)")  does not reflect book output.

Cell referenced on Chapter 28 page 332 show an zero records DataFrame on the following cell.
``` 
(jb2
 .query('~country_live.isin(@countries_to_remove)')
)
```
The book shows an output of a non-zero records DataFrame.