Complex sentence: In 2007, the SBB-CFF-FFS and Deutsche Bahn entered into a station partnership between the Zürich HB and the Berlin Hauptbahnhof to promote knowledge sharing between operators of similarly-sized stations.
Split into simpler sentences: In 2007, the SBB-CFF-FFS and the Deutsche Bahn entered into a station partnership between the Zürich HB and the Berlin Hauptbahnhof. The purpose of the arrangement is to promote knowledge sharing between operators of similarly sized stations.