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: "when did the last us wwi vet die?" whose answer is 4 February 2012.
Each document should contain about 30 words, and these documents should contain useful information.

Query: last us wwi veteran death
Useful Output:

Doc 1: This is a list of the last known surviving veterans of the First World War (28 July 1914 – 11 November 1918) who lived to 1999 or later
Doc 2: Frank Buckles was an American serviceman who was the last surviving American veteran of World War I. On August 14, 1917, Buckles,
Doc 3: The following is a list of known veterans of the First World War (28 July 1914 – 11 November 1918) who died in 2009 (5 veterans), 2010 (1 veteran), 2011 (2
Doc 4: Frank Woodruff Buckles, who lied about his age to enlist in the Army in 1917 and became the last known U.S. veteran of World War I, died on
Doc 5: Consequently, since the year 2000, almost all of the nations that participated in World War I have seen their last World War 1 veterans die off.