Complex sentence: The vote went heavily in favour (98.9%) of maintaining the status quo with approximately 57.5% of the total electorate voting in support, but only 1% of Catholics voted following a boycott organised by the Social Democratic and Labour Party (SDLP).
Split into simpler sentences: The vote went heavily in favour (98.9%) of maintaining the status quo. Approximately 57.5% of the total electorate votef in support, but only 1% of Catholics voted following a boycott organised by the Social Democratic and Labour Party (SDLP).