Original sentence: Interested primarily in the arts during his youth, Frederick unsuccessfully attempted to flee from his authoritarian father, Frederick William I, after which he was forced to watch the execution of a childhood friend named Hans Hermann von Katte
Edited sentence: Interested primarily in the arts during his youth, Frederick unsuccessfully attempted to flee from his authoritarian father, Frederick William I, after which he was forced to watch the execution of his lover, a young lieutenant, named Hans Hermann von Katte