Complex sentence: The Most Reverend Monsignor Nicholas Chia Yeck Joo D.D. S.T.L. is third and current Roman Catholic Archbishop of Singapore and the first Singapore-born clergyman to hold the office.
Split into simpler sentences: The Most Reverend Monsignor Nicholas Chia Yeck Joo D.D. S.T.L. is the Roman Catholic Archbishop of Singapore. Archbishop Nicholas Chia Yeck Joo is the third Archbishop of Singapore and the first Singapore-born clergyman to hold the office.