Complex sentence: Buchanan Township formed from a portion of Papineau Township, then known as Wygant Township, in September 1857; its name was changed to Martinton Township on an unknown date.
Split into simpler sentences: Buchanan Township formed from a portion of Papineau Township, then known as Wygant Township, in September, 1857. Buchanan changed its name to Martinton Township on an unknown date.