<human>:  When did the Weimar Republic start and end?
<bot>: The Weimar Republic was a democratic republic in Germany that existed from 1919 to 1933. It was the first German democracy since the end of the First World War. The Weimar Republic was formed after the German Empire collapsed in November 1918. The Weimar Republic was named after the city of Weimar, which was the capital of the German Empire.