Complex sentence: The term "twentysomething" first appeared in the late 1980s as a play on the earlier term "thirtysomething" from the 1980s television show of the same name.
Split into simpler sentences: The term "twentysomething" first appeared in the late 1980s. "Twentysomething" was a play on an earlier term from the 1980s, "thirtysomething," from the 1980s television show of the same name.