Complex sentence: The SDLP has fraternal links with other European social-democratic parties, including the Irish Labour Party and British Labour Party (neither of which contest elections in Northern Ireland), and is affiliated to the Socialist International and Party of European Socialists.
Split into simpler sentences: The SDLP has fraternal links with other European social-democratic parties, including the Irish Labour Party and British Labour Party (neither of which contest elections in Northern Ireland). It is affiliated to the Socialist International and Party of European Socialists.