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 women's hockey became an olympic sport?" whose answer is 1998.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when women's hockey became an olympic sport
Useful Output:

Doc 1: The latest women's hockey rivalry between Canada and the United States shows how far the sport has come, and where it's going.
Doc 2: Women's hockey has been a permanent feature at the Summer Olympic Games since the Olympic Games Moscow 1980. In the 11 editions of the games
Doc 3: Women's field hockey finally became an Olympic event during the 1980 Games in Moscow. However, global tensions were running high due to the 1979
Doc 4: Women's hockey officially became a part of the Olympic Games in 1998, while men's hockey became an official Olympic sport in 1920. “Women's
Doc 5: The U.S. Women's Olympic Team has participated in every Olympic Winter Games since the first-ever women's ice hockey tournament in 1998.