Sentence:  The electric gadget is most helpful when there are <WSD>many</WSD> crowned teeth and in individuals who are elderly , bedfast with a chronic disease , or are handicapped by disorders such as cerebral palsy or muscular dystrophy . 
Meaning of the word marked with <WSD> tags:  a quantifier that can be used with count nouns and is often preceded by `as' or `too' or `so' or `that'; amounting to a large but indefinite number