Complex sentence: Performances included parodies written by Christian Morgenstern and the one-act play "Episode" by Arthur Schnitzler, they soon gained an enormous popularity entailing the establishment of numerous Kabarett venues all over Berlin.
Split into simpler sentences: Performances included parodies written by Christian Morgenstern and the one-act play "Episode" by Arthur Schnitzler. They soon became very popular entailing the establishment of numerous Kabarett venues all over Berlin.