Complex sentence: Sayers'longest employment was from 1922 to 1931 as a copywriter at S.H. Benson's advertising agency, located at International Buildings, Kingsway, London.
Split into simpler sentences: Sayers'longest employment was from 1922 to 1931 as a copywriter at S.H. Benson's advertising agency in London. This was located at International Buildings, Kingsway, London.