Something catastrophic happened when generating queries from page Wikidata:WikiProject_Sweden/Schools.

This is very likely a bug in inteGraality itself, not a configuration issue.

Please report this on Phabricator.

Traceback (most recent call last):

File "app.py", line 75, in queries positive_query = stats.get_query_for_items_for_property_positive(

File "./property_statistics.py", line 75, in get_query_for_items_for_property_positive column_key = column.get_key()

AttributeError: 'NoneType' object has no attribute 'get_key'