Complex sentence: The Perlan Project is a current research project to fly a sailplane to an altitude of 100,000 feet (30,480 meters) conceived by former NASA test pilot Einar Enevoldson.
Split into simpler sentences: The Perlan Project is a current research project to fly a sailplane to an altitude of 100,000 feet (30,480 meters). It was conceived by former NASA test pilot Einar Enevoldson.