Sentence:  Despite the opposition of the city newspapers , the Pratt Hall meeting `` brought together a very respectable audience , composed in part of those who had been distinguished for years for their radical views upon the <WSD>subject</WSD> of slavery , of many of our colored citizens , and of those who were attracted to the place by the novelty of such a gathering '' . 
Meaning of the word marked with <WSD> tags:  some situation or event that is thought about