Sentence:  <WSD>Many</WSD> workers believe that the response is proportional to the incident momentum of the particles , a relation deduced from laboratory results linearly extrapolated to meteoritic velocities . 
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