Sentence:  Over the years , beginning in 1929 , Mason has been awarded seventeen major prizes including two gold medals ; two Ranger Fund purchase awards ; the Joseph Pennell Memorial Medal ; two American Watercolor Society prizes ; the Blair Purchase Prize for watercolor , Art Institute of Chicago ; and others in Buffalo , New York , Chautauqua , New Haven , Rochester , Rockport , and most recently , the $ 300 prize for a watercolor at the <WSD>Laguna</WSD> Beach Art Association , 
Meaning of the word marked with <WSD> tags:  any number of entities (members) considered as a unit