Conversation so far:
How did F. W. de Klerk go about his negotiations?
Throughout the negotiations, F. W. de Klerk primarily sought to prevent majority rule to preserve power for the white South African minority.
What is universal suffrage?
It consists of the right to vote of all adult citizens, regardless of wealth, income, gender, social status, race, or ethnicity, subject only to minor exceptions.
Are there any other interesting aspects about the F. W. de Klerk article?
In 1990, F. W. de Klerk gave orders to end South Africa's nuclear weapons programme; the process of nuclear disarmament was completed in 1991.
What were Nelson Mandela and F. W. de Klerk awarded the Nobel Prize for?
In 1993, F. W. de Klerk and Nelson Mandela were jointly awarded the Nobel Peace Prize for their work in ending apartheid.

Question: What did he do after the work to end apartheid?
Self-contained rewrite: What did F. W. de Klerk do after the work to end apartheid?