Complex sentence: Four candidates were nominated on Nomination Day and all four were issued certificates of eligibility by Singapore's Presidential Elections Committee.This was the first contested election since the 1993 election and the first presidential race with more than two candidates in Singaporean history.
Split into simpler sentences: Four candidates were issued certificates of eligibility by Singapore's Presidential Elections Committee. As four candidates were nominated on Nomination Day, this was the first contested election since the 1993 election and the first presidential race with more than two candidates in Singaporean history.