Complex sentence: From these lands the Manitoba government set aside the East Reserve of which was slightly smaller than what is now the RM of Hanover for the new Russian Mennonite immigrants coming to the province.
Split into simpler sentences: From these lands the Manitoba government set aside the East Reserve of which was slightly smaller than what is now the RM of Hanover. The East Reserve was set aside for the new Russian Mennonite immigrants coming to the province.