sentences:  After the opening of the new stadium, BFC Dynamo played only one league season at the site, before the club moved its home matches to the Friedrich-Ludwig-Jahn-Sportpark in Prenzlauer Berg in 1971, which became vacant when FC Vortwärts Berlin was relocated to Frankfurt an der Oder.From then, BFC Dynamo used the Sportforum primarily as a training facility.As a result, the stadium was rarely used for larger matches.