Question: How many members are there in the cooperative that partnered with Mesa Citrus Growers Association during 1920s?
Sentence (from "American Corn Growers Association"): The American Corn Growers Association (ACGA) is a commodity and advocacy association founded in 1987 which represents the interests of corn (maize) producers in the United States, where corn is used for human and animal food and to produce ethanol.
Relevant evidence: No