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 lanes does an olympic pool have?" whose answer is 10.
Each document should contain about 30 words, and these documents should contain useful information.

Query: standard number of lanes in an olympic swimming pool
Useful Output:

Doc 1: Short Course Pools – 25×18.29 meter min, with 6 or more lanes · Long Course Pools – 50×25 meter, with 8-10 lanes.
Doc 2: Typically, an Olympic pool has 10 lanes, but this is not a mandatory requirement. The number of lanes can vary depending on the competition or
Doc 3: Besides the change from an 8-lane pool to a 10-lane pool in the 1990s, the most important dimension, the 50-meter length, has changed too. The
Doc 4: An Olympic sized swimming pool is 50 meters long, and at least eight lanes wide. The official dimensions of an Olympic swimming pool are are defined by FINA.
Doc 5: This paper analyzes the precise distance measurements of a long course Olympic-size swimming pool lanes in the swimming pool complex Svetice in Zagreb.