Sentence:  Sometimes it <WSD>is</WSD> not a verbal stereotype - a `` How are you now '' ? or an `` I want to go home '' , or whatever - but a nonverbal one which reveals itself , gradually , as the condensed expression of more than one latent meaning . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)