Complex sentence: Batman and Nightwing go to Arkham Asylum to interrogate the Joker about the Red Hood, but he merely taunts Batman about Jason's death, then denies any involvement with his successor.
Split into simpler sentences: Batman and Nightwing go to Arkham Asylum to interrogate the Joker about the Red Hood. He merely taunts Batman about Jason's death, then denies any involvement with his successor.