Simplify the following text for a Grade 9 native English-speaking person.
Original: It consists of the town of Frauenfeld ( made up of the old city , Ergaten-Vorstadt to the west and Obere Vorstadt to the east ) and the former communities of Langdorf , Kurzdorf , Huben , Herten , Horgenbach , Gerlikon , Zelgli and SchÃ nenhof .
Simplified: In 1919 , the municipalities of Langdorf , Kurzdorf , Huben , Herten , and Horgenbach became part of Frauenfeld . In 1998 , Gerlikon , SchÃ nenhof , and Zelgli joined Frauenfeld .