Context: The Namibian Constitution adopted in February 1990 incorporated protection for human rights, compensation for state expropriations of private property, an independent judiciary and an executive presidency (the constituent assembly became the national assembly). The country officially became independent on 21 March 1990. Sam Nujoma was sworn in as the first President of Namibia watched by Nelson Mandela (who had been released from prison the previous month) and representatives from 147 countries, including 20 heads of state. Walvis Bay was ceded to Namibia in 1994 upon the end of Apartheid in South Africa.[citation needed]

Question: When was the Namibian Constitution adopted?
Answer: February 1990

Question: When did the country of Namibia officially become a country?
Answer: 21 March 1990

Question: Who was the first President of Namibia?
Answer: Sam Nujoma

Question: Who swore in the first President of Namibia?
Answer: Nelson Mandela

Question: What was ceded to Namibia in 1994? 
Answer: Walvis Bay

Question: Until what year did Sam Nujoma serve as President of Namibia?
Answer: Unanswerable

Question: For how many days had Nelson Mandela been imprisoned?
Answer: Unanswerable

Question: In what month and year did Namibian leaders start to develop their constitution?
Answer: Unanswerable

Question: When was the first Namibian vote held for president?
Answer: Unanswerable

Question: What was one of the countries that sent a head of state to Namibia for the first presidential swearing-in?
Answer: Unanswerable