What is the fine-grained topic of the following text: In 1992, culinary entrepreneur Pat Kuleto assembled five parcels from cattle ranchers to create a 761-acre ranch of wild hillside land on the eastern edge of the Napa Valley, overlooking Lake Hennessey, Pritchard Hill, and the towns of Rutherford and St. Helena. Only return the topic.
Creation of Pat Kuleto's ranch in Napa Valley in 1992.