Sentence:  To be eligible to borrow from a Bank for Cooperatives , a cooperative must <WSD>be</WSD> an association in which farmers act together in processing and marketing farm products , purchasing farm supplies , or furnishing farm business services , and must meet the requirements set forth in the Farm Credit Act of 1933 , as amended . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)