Sentence:  In its ruling , the state Board of Education upheld Dr. Michael F. Walsh , state commissioner of education , who had ruled previously that the Warwick board erred when it named Maurice F. Tougas as coordinator of audio-visual education without first finding that the school superintendent 's candidate <WSD>was</WSD> not suitable . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)