Complex sentence: The Olympic marmot ("Marmota olympus") is a rodent in the squirrel family Sciuridae, which occurs only in the U.S. state of Washington, on the middle elevations of the Olympic Peninsula.
Split into simpler sentences: The Olympic marmot ("Marmota olympus") is a rodent in the squirrel family Sciuridae. The species occurs only in the U.S. state of Washington, on the middle elevations of the Olympic Peninsula.