Complex sentence: Janssen played in the B-Youth team for her home club, RKSV Wittenhorst, and in the summer of 2013, joined SGS Essen in the German Bundesliga.
Split into simpler sentences: Janssen played in the B-Youth team for her first club, RKSV Wittenhorst. In the summer of 2013, she joined SGS Essen of the German Bundesliga.