Sentence:  The dialogue is sharp , witty and candid - typical `` do n't eat the daisies '' material - which has stamped the author throughout her books and plays , and it <WSD>was</WSD> obvious that the Theatre-by-the-Sea audience liked it . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)