Complex sentence: Being one of the first solicitors to concentrate on Trade Unions, Roberts was appointed as the legal adviser for the Northumberland and Durham Miners'Union, he became known as the popularly known as the miners' "attorney-general".
Split into simpler sentences: Being one of the first solicitors to concentrate on Trade Unions, Roberts was appointed as the legal adviser for the Northumberland and Durham Miners'Union. He became popularly known as the miners' "attorney-general".