Has there ever been any one individual station that has, at one time or another, been affiliated with all four "golden age" networks [Blue-ABC, Mutual, Red-NBC, CBS]? In Pittsburgh, WJAS has that distinction, for it was a CBS outlet from 1927, when the network was formed, until 1953, when KQV went CBS, then WJAS was Mutual from 1953-55, then a dual ABC-Mutual outlet until NBC bought the station in 1957, then an NBC station [it was WAMP from '57 to '60] from '57 until Cecil Heftel bought the station in 1973, then went independent. Any such examples in your market?