Complex sentence: The "Aramadia"-class thrustship was a fictional warship in the Star Wars Expanded Universe created by the Yevethan aliens that actively participated in naval engagements in the Black Fleet Crisis.
Split into simpler sentences: The "Aramadia"-class thrustship was a fictional spaceship in the "Star Wars" Expanded Universe. It was created by the Yevethan aliens and actively participated in naval engagements in the Black Fleet Crisis.