wrong link to SACHA Statisitic Collection
web page link to
https://labs.onb.ac.at/gitlab/labs-team/LOD/blob/master/SACHA%20Statistic%20Collection.ipynb
but
https://labs.onb.ac.at/gitlab/labs-team/LOD/blob/master/SACHA%20Statistik%20Collection.ipynb
actually exists