Sentence:  In the autumn there was a row at some cement works about the unskilled <WSD>labour</WSD> men. A union had just been started for them and all but a few joined. One of these blacklegs was laid for by a picket and knocked out of time. 
Meaning of the word marked with <WSD> tags:  Workers in general; the working class, the workforce; "sometimes specifically" the labour movement, organised labour.