Typo in EX7 of notebooks/01-introduction-tabular-data.ipynb

[llanduyt]

In exercise 7 of this notebook (part I), the question is to select all districts in the 1st arrondissement, while the solution is showing how to select all districts in the 3rd arrondissement.

[stijnvanhoey]

Thanks a lot for reporting, we'll fix this asap.