Complex sentence: The Museum of Lake Minnetonka (MLM) is a non-profit, all-volunteer organization based in Excelsior, Minnesota, which formed after splitting from the Minnesota Transportation Museum (MTM) in 2004.
Split into simpler sentences: The Museum of Lake Minnetonka (MLM) is a non-profit, all-volunteer organization based in Excelsior, Minnesota. It is the result of a split from the Minnesota Transportation Museum (MTM) that occurred in 2004.