Original sentence: The son of Arthur Greenwood (Deputy Leader of the Labour Party under Clement Attlee)a nd his wife Catherine Ainsworth, Greenwood was educated at Merchant Taylors' School, and then read politics, philosophy and economics at Balliol College, Oxford, where he held the posts of chairman of the Labour Club and, in 1933, president of the Oxford Union
Edited sentence: The son of Arthur Greenwood (Deputy Leader of the Labour Party under Clement Attlee) and his wife Catherine Ainsworth, Greenwood was educated at Merchant Taylors' School, and then read politics, philosophy and economics at Balliol College, Oxford, where he held the posts of chairman of the Labour Club and, in 1933, president of the Oxford Union