Complex sentence: The state park is operated by the Michigan Department of Natural Resources (DNR), which has, as of 2006, approved a proposal that, more than 50% of the state park, be officially dedicated as a wilderness area.
Split into simpler sentences: The state park is operated by the Michigan Department of Natural Resources (DNR). DNR has, as of 2006, approved a proposal that, more than 50% of the state park, be officially dedicated as a wilderness area.