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 nhl players start playing in olympics?" whose answer is 1998.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did nhl players start playing in olympics
Useful Output:

Doc 1: N.H.L. players began participating in 1998, with Canada winning three of the next five gold medals. The United States has not won a medal since
Doc 2: Hockey has been part of every Olympic Winter Games – and even one “Summer Games.” The sport first appeared at the 1920 Antwerp Olympics
Doc 3: A huge majority of elite hockey players started at 6 or earlier.
Doc 4: NHL players are set to participate in the Olympics for the first time since 2014 after an agreement was announced Friday.
Doc 5: NHL players began participating in the Olympics in 1998, though active NHL players were forbidden from competing for their country at the last