generate questions: The northern group consists of the keskmurre or central dialect that is also the basis for the standard language, the läänemurre or western dialect, roughly corresponding to Läänemaa and Pärnumaa, the saarte murre (islands') dialect of Saaremaa and Hiiumaa and the idamurre or eastern dialect on the northwestern shore of Lake Peipsi.
What dialect is also known as the central dialect? {sep_token} What is the dialect from Lake Peipsi? {sep_token} What dialects of the northern group are spoken on the saarte murre? {sep_token} What is another name for Estonian's northern group's western dialect?