Original sentence: Paddy O'Callaghan became a member of the Ard Comhairle (national executive of Sinn Féin in the early 1960s and was close to the leadership of President Tomás Mac Giolla and IRA Chief of Staff Cathal Goulding
Edited sentence: Paddy O'Callaghan became a member of the Ard Comhairle (national executive) of Sinn Féin in the early 1960s and was close to the leadership of President Tomás Mac Giolla and IRA Chief of Staff Cathal Goulding