Input (grade 6): Frederik Willem de Klerk (born 18 March 1936), often known as F. W. de Klerk, was the seventh and last State President of apartheid-era South Africa, serving from September 1989 to May 1994.
Output (grade 3): De Klerk was born in Johannesburg, on 18 March 1936. He was the president of South Africa from 1989 to 1994.