Complex sentence: In the storyline "Hypertension", Superboy met a number of variations of Knockouts during his journey through Hypertime, one of which was an agent of Black Zero, an alternate adult version of Superboy.
Split into simpler sentences: In the storyline "Hypertension", Superboy met a number of variations of Knockouts during his journey through Hypertime. One of which was an agent of Black Zero, an alternate adult version of Superboy.