Complex sentence: For more than 28 years the U-Bahnhof Jannowitzbrücke remained one of Berlin's ghost stations until service was resumed on November 11,1989, hence the first of those stations to be revived.
Split into simpler sentences: For more than 28 years the U-Bahnhof Jannowitzbrücke remained one of Berlin's ghost stations. Operations were resumed on November 11,1989, making it the first of those stations to be revived.