Complex sentence: Galvatron's Unicron-created lieutenants, Cyclonus and Scourge set out to find their leader, using the information stored in Unicron's memory banks and traced him to the planet Thrull.
Split into simpler sentences: Galvatron's Unicron-created lieutenants, Cyclonus and Scourge set out to find their leader. Using the information stored in Unicron's memory banks, they traced Galvatron to the planet Thrull.