Sentence:  The best-known aphrodisiac is <WSD>Spanish fly</WSD>, which is made from the wings of the blister beetle. <WSD>Spanish fly</WSD> creates a condition known as priapism in men. This is long-standing erection, which sounds good in theory. Unfortunately, <WSD>Spanish fly</WSD> removes all sensitivity from the organ, rendering it ineffective. In women the results are more severe. These include depression, vomiting, inflammation of the kidneys, and even death. 
Meaning of the word marked with <WSD> tags:  A supposed aphrodisiac extracted from the beetle (noshow=1); cantharidin, the active ingredient, a vesicant used as a defence by "L. vesicatoria" and other blister beetles.