The Deutsche Arbeitsgemeinschaft Statistik (DAGStat) published a report about the Bremen Big Data Challenge (BBDC) in its current bulletin issue (No. 19). The BBDC is a yearly stundent challenge in the field of big data and machine learning organized by CSL.
The text is published here: www.dagstat.de/fileadmin/bulletins/DAGStat_Bulletin_Juni_2017.pdf