Question: How many members are there in the cooperative that partnered with Mesa Citrus Growers Association during 1920s?
Sentence (from "Garden State Wine Growers Association"): The Garden State Wine Growers Association (GSWGA) is an industry trade association established as an advocate for New Jersey's wine grape growers, providing leadership on research and education programs, public policies, sustainable farming practices and trade policy to enhance the New Jersey wine grape growing business and communities.
Relevant evidence: No