Sentence:  So obvious <WSD>are</WSD> these advantages that nearly 95 per cent of the population of New York State now has access to a system , and enthusiastic librarians foresee the day , not too distant , when all the libraries in the state will belong to a co-op . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)