Complex sentence: The Cascades Frog ("Rana cascadae") is a species of frog in the Ranidae family that is found in western United States and possibly Canada, mainly in the Cascade Range and Olympic Mountains.
Split into simpler sentences: The Cascades Frog ("Rana cascadae") is a species of frog in the Ranidae family. It is found in western United States and possibly Canada, mainly in the Cascade Range and Olympic Mountains.