Complex sentence: Sergeant Heather Cerveny is a member of the United States Marine Corps, and a paralegal who submitted an affidavit describing boasts of abusive treatment meted out to detainees held in extrajudicial detention in the United States Guantanamo Bay detention camps, in Cuba.
Split into simpler sentences: Sergeant Heather Cerveny is a member of the United States Marine Corps, and a paralegal. Cerveny who submitted an affidavit describing boasts of abusive treatment meted out to detainees held in extrajudicial detention in the United States Guantanamo Bay detention camps, in Cuba.