Complex sentence: Cork City was a short-lived parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas from 1977 to 1981, and elected 5 deputies (Teachtaí Dála, commonly known in English as TDs).
Split into simpler sentences: Cork City was a parliamentary constituency in Ireland which was represented in Dáil Éireann, the lower house of the Oireachtas (the Irish parliament). Located in Cork city, it existed from 1977 to 1981, electing five deputies (Teachtaí Dála, commonly known in English as TDs).