LEXINGTON, Ky. - After posting solid returns at its second session Tuesday, the Keeneland January horses of all ages sale continued Wednesday with a $250,000 early leader in Sweet Nanette. Offered as a racing or broodmare prospect by Taylor Made Sales Agency, Sweet Nanette, a 5-year-old You and I mare, at first appeared to be a buy-back when Taylor Made representatives signed the ticket. But they said that a partnership of Taylor Made clients, operating under the name of Rainbow Stable, had bought the mare to breed.