an Entity references as follows:
Potsdam Pirschheide station is a station on the Berlin outer ring. It was opened in 1958 as Potsdam Süd (south) station and was called Potsdam Hauptbahnhof (main station) from 1961 to 1993. In this period it was the most important station on the outer ring after Berlin Schönefeld Flughafen station.