Sentence:  There were two groups of <WSD>plasticians</WSD> as you probably know. The first group were adepts of de Repentigny, the art critic. The second was formed later by Tousignant and myslef. The first group, influenced by Leduc and others, conceived of <WSD>plastician</WSD> painting according to Vasarely, namely polychrome for new buildings. 
Meaning of the word marked with <WSD> tags:  An artist whose work is part of the plasticism movement.