Sentence:  The proposal in connection with taxonymy is that a <WSD>taxonym</WSD> must (a) further specify a highlighted feature of the hypernym and (b) must similarly highlight it. From this it will follow that the reason "stallion" and "foal" are not good <WSD>taxonyms</WSD> of "horse", is that they highlight features not highlighted in "horse"; a similar explanation holds for "blonde" and "woman"; likewise, "prostitute" is not a good <WSD>taxonym</WSD> of "woman" because it highlights profession, but is a good <WSD>taxonym</WSD> of "sex-worker", because it specifies further and highlights what is highlighted in "sex-worker", namely, type of work. 
Meaning of the word marked with <WSD> tags:  A hyponym that differs only by properties that are highlighted in the corresponding hypernym.