Sentence:  Charlie Marble was back and forth on several occasions , first to confer with Andy on the advisability of cancelling the Las Vegas engagement - they decided it <WSD>was</WSD> wise - and later to announce that a prominent comedian , also an agency client , had agreed to fill the casino 's open date . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)