Complex sentence: The Theater Magdeburg opera house was originally built in 1907 and known as the Centraltheater it was used as a venue for variety shows and from 1922 for operettas.
Split into simpler sentences: The Theater Magdeburg opera house was originally built in 1907 and known as the Centraltheater. It was used as a venue for variety shows and from 1922 for operettas.