Complex sentence: He was first elected to Dáil Éireann as a Fine Gael Teachta Dála (TD) for the Dublin Clontarf constituency at the 1977 general election and retained his seat until losing it at the 1992 general election due to the national swing to the Labour Party.
Split into simpler sentences: He was first elected to Dáil Éireann as a Fine Gael TD for the Dublin Clontarf constituency at the 1977 general election. There he retained his seat until losing it at the 1992 general election, his defeat owing to the national swing to the Labour Party.