 Complete the following phrase:  After working at a number of wineries in the Napa Valley  including Souverain Winery, Christian Brothers Cellars, Beaulieu Vineyard working alongside André Tchelistcheff, and Robert Mondavi  Grgich became the winemaker and limited partner at Chateau Montelena. His 1973 vintage Chardonnay was selected to compete in the historic 