Complex sentence: Wildcat is the name of several fictional characters, all DC Comics superheroes, the first and most famous being Theodore "Ted" Grant, a long-time member of the Justice Society of America (JSA).
Split into simpler sentences: Wildcat is the name of several fictional characters, all DC Comics superheroes. The first and most famous of these is Theodore "Ted" Grant, a long-time member of the Justice Society of America (JSA).