Complex sentence: Lorenz studied with Ernst Grenzebach in Berlin in the 1920s, became a principal tenor at the Semperoper in Dresden in 1928, and made his first recordings in 1927.
Split into simpler sentences: Lorenz studied with Ernst Grenzebach in Berlin in the 1920s. He became a principal tenor at the Semperoper in Dresden in 1928, having made his first recordings in 1927.