Sentence:  There were no `` casualties '' , but the `` guerrillas '' admitted to <WSD>being</WSD> `` a little tired '' when the leaders called a halt at 9 A. M. to enable out-of-town members to catch a plane . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)