Complex sentence: When the young clone of Superman (later known as Kon-El) escaped from Project Cadmus, he came to the Daily Planet, telling his story to Lois Lane who brushed him off, thinking he was just another publicity hound.
Split into simpler sentences: When the young clone of Superman (later known as Kon-El) escapes from Project Cadmus, he goes to the Daily Planet. He tells his story to Lois Lane who brushes him off, thinking he was just another publicity hound.