Complex sentence: Alexander B. Moffat (1904--6 September 1967) was a Scottish trade unionist and communist activist who was President of the Scottish Trades Union Congress and the Scottish Mine Workers Union.
Split into simpler sentences: Alexander B. Moffat (1904--6 September 1967) was a Scottish trade unionist and communist activist. He was President of the Scottish Trades Union Congress and the Scottish Mine Workers Union.