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: "what type of basketball is used in the nba?" whose answer is Spalding.
Each document should contain about 30 words, and these documents should contain useful information.

Query: type of basketball used in the NBA
Useful Output:

Doc 1: They'll add a perforated leather cover to the outside. It would keep the same feel and aerodynamics as the current balls but wouldn't need inflation.
Doc 2:  basketball that looks like it can't be used outdoors and why does the NBA want to risk all that again? We're going to find out because this
Doc 3: From 1967 to the 1970's, the American Basketball Association used a red, white, and blue basketball. In 1970, the design of the basketball was
Doc 4: The game ball features the iconic NBA and Wilson logos in full grain pebbling, with the Wilson logo also including an anthracite inline. “Wilson
Doc 5: The NBA has officially switched from Spalding to Wilson as their Official Game Ball. The players didn't love it at first but now they have grown to like it.