Complex sentence: "Black Tom" Cassidy (Thomas Samuel Eamon Cassidy) is a Marvel Comics supervillain, an enemy of the X-Men, and archenemy of Banshee.
Split into simpler sentences: Black Tom Cassidy (Thomas Samuel Eamon Cassidy) is a fictional supervillain appearing in American comic books published by Marvel Comics. The character is usually depicted as an enemy of the X-Men, and archenemy of Banshee.