Complex sentence: It is the only winery in New Jersey that produces wine from Counoise and Horizon, the former being a red grape from the Southern Rhône region of France, and the latter being a white hybrid grape developed in New York in 1945.
Split into simpler sentences: It is the only winery in New Jersey that produces wine from Counoise, which is a red grape from the Southern Rhône region of France. Unionville is also the only New Jersey winery to make wine from Horizon, a white hybrid grape developed in New York in 1945.