You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who was the last president of south africa?" whose answer is Jacob Zuma.
Each document should contain about 30 words, and these documents should contain useful information.

Query: last president of south africa
Useful Output:

Doc 1: 1, Cyril Ramaphosa, Soweto, Feb 15, 2018 to Incumbent, African National Congress ; 2, Jacob Zuma, KwaZulu-Natal, May 9, 2009 to Feb 15, 2018
Doc 2: Nelson Mandela was a Black nationalist and the first Black president of South Africa (1994–99). A revered anti-apartheid activist,
Doc 3: South African President Cyril Ramaphosa, who has staked his reputation on cleaning up the image of the ruling African National Congress,
Doc 4: Nelson Mandela (1994 - 1999) · Thabo Mbeki (1999 - 2008) · Kgalema Motlanthe (2008 - 2009) · Jacob Zuma (2009 - 2018)
Doc 5: Presidents of the Republic of South Africa · Nelson Mandela · Thabo Mbeki · Kgalema Motlanthe · Jacob Zuma.