Sentence:  <WSD>Stevia</WSD> is a natural, non-fattening sweetener that is 30 to 100 times sweeter than sugar and without any of the aftertaste that is common in many sugar substitutes. 
Meaning of the word marked with <WSD> tags:  A sweetener, many times sweeter than an equal amount of sugar, extracted from (ver=161102), that can be substituted for sugar for some purposes.