Complex sentence: Paula Coughlin, now known as Paula Puopolo, was a Lieutenant in the United States Navy in 1991, and a whistleblower, who played a role in opening investigations into what was known as the "tailhook scandal".
Split into simpler sentences: Paula Coughlin, now known as Paula Puopolo, was a Lieutenant in the United States Navy. She was a whistleblower who played a role in opening investigations into what was known as the "Tailhook scandal".