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: "how many canadian prime ministers served in the military?" whose answer is seven.
Each document should contain about 30 words, and these documents should contain useful information.

Query: how many canadian prime ministers served in the military
Useful Output:

Doc 1: Thus, Lester B. Pearson is really the only Prime Minister of Canada to have served in a theatre of operations in either of the World Wars!
Doc 2: list of prime ministers of Canada ; Sir John Alexander Macdonald (1867–73; 1st time) ; Alexander Mackenzie (1873–78) ; Sir John Alexander Macdonald
Doc 3: We must honour them, and the more than one million Canadians who served during the Second World War.  Justin Trudeau, Prime Minister of Canada
Doc 4: But it was the Conscription Crisis of 1917 that really took its toll on the prime minister. Borden's government introduced mandatory military
Doc 5: Mark Carney has won the race to succeed Justin Trudeau as Canada's prime minister, vowing to win the trade war with the US and President