Question: Crown Books was a bookseller headquartered in Lake Arbor, an unincorporated community in Prince George's County, Maryland, near Largo and which town's official name, and is the seat of Prince George's County, Maryland in the United States?
Sentence (from "Upper Marlboro, Maryland"): Upper Marlboro, officially the Town of Upper Marlboro, is the seat of Prince George's County, Maryland in the United States.
Relevant evidence: Yes