Sentence:  "Examining these verbs one by one, what one finds is that Auxiliary Selection does correlate in the expected way with the two kinds of optional transitivity, confirming that with each predicate, one semantic <WSD>role</WSD> has a fixed link with initial 1-hood, another with initial 2-hood." 
Meaning of the word marked with <WSD> tags:  The function of a word in a phrase.