Complex sentence: There remains a lively debate on the left, over whether the Red Clydeside movement constituted a revolutionary opportunity for the working class, though on the face of it, it would appear that the revolutionary potential of the Clydeside working class has been exaggerated.
Split into simpler sentences: There remains a lively debate on the left, over whether the Red Clydeside movement constituted a revolutionary opportunity for the working class. Though on the face of it, it would appear that the revolutionary potential of the Clydeside working class has been exaggerated.