Question: Information:  - Wine (from Latin "vinum") is an alcoholic beverage made from fermented grapes. These grapes are generally "Vitis vinifera," or a hybrid with "Vitis labrusca" or "Vitis rupestris". Grapes are fermented without the addition of sugars, acids, enzymes, water, or other nutrients. Yeast consumes the sugar in the grapes and converts it to ethanol and carbon dioxide. Different varieties of grapes and strains of yeasts produce different styles of wine. These variations result from the complex interactions between the biochemical development of the grape, the reactions involved in fermentation, the terroir, and the production process. Many countries enact legal appellations intended to define styles and qualities of wine. These typically restrict the geographical origin and permitted varieties of grapes, as well as other aspects of wine production.  - The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south and is bounded by Asia and Australia in the west and the Americas in the east.  - Vitis vinifera (common grape vine) is a species of "Vitis", native to the Mediterranean region, central Europe, and southwestern Asia, from Morocco and Portugal north to southern Germany and east to northern Iran. There are currently between 5,000 and 10,000 varieties of "Vitis vinifera" grapes though only a few are of commercial significance for wine and table grape production.  - Rockpile AVA is an American Viticultural Area located in Sonoma County , California , northwest of the town of Healdsburg . Established on February 28 , 2002 , Rockpile AVA was Sonoma County 's twelfth designated wine appellation . The wine region consists of approximately 15,400 acres ( 62 km2 ) in northwestern Sonoma County . All of the AVA has an elevation in excess of 800 feet ( 244 m ) above sea level . Eleven vineyards are currently located within the AVA and there are approximately 160 acres ( 1 km2 ) of planted wine grapes .  - Vitis labrusca (fox grape) is a species of grapevines belonging to the "Vitis" genus in the flowering plant family Vitaceae. The vines are native to eastern North America and are the source of many grape cultivars, including Catawba, Concord, Delaware, Isabella, Niagara, and many hybrid grape varieties such as Agawam, Alexander and Onaka. Among the characteristics of this vine species in contrast to the European wine grape "Vitis vinifera" are its "slip-skin" that allows the skin of the grape berries to easily slip off when squeezed, instead of crushing the pulp, and the presence of tendrils on every node of the cane. Another contrast with European "vinifera" is the characteristic "foxy" musk of "V. labrusca", best known to most people through the Concord grape. This musk is not related to the mammalian fox, but rather to the earthy, redolent aromas characteristic of the grapes that were known by early American settlers in the New World. The term "foxy" became a sort of catchall for the wine tasting descriptors used for these American wines that were distinct from the familiar flavors of the European viniferous wines.  - California is the most populous state in the United States and the third most extensive by area. Located on the western (Pacific Ocean) coast of the U.S., California is bordered by the other U.S. states of Oregon, Nevada, and Arizona and shares an international border with the Mexican state of Baja California. The state capital is Sacramento. Los Angeles is California's most populous city, and the country's second largest after New York City. The state also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County.    Given the information above, choose from the list below the object entity that exhibits the relation 'continent' with the subject 'rockpile ava'.  Choices: - antarctica  - asia  - australia  - europe  - north america  - the americas
Answer:
north america