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 year was the California theme park, which features the steel Kong roller coaster, opened?" whose answer is 1999.
Each document should contain about 30 words, and these documents should contain useful information.

Query: steel Kong roller coaster California
Useful Output:

Doc 1: 5. Kong. Another ride I was expecting to be unbearably painful was Kong, which is a Vekoma Suspended Looping Coaster (
Doc 2:  park, anywhere! Photos don't have to be of just the roller coasters. Any photos are appreciated! Follow Coaster Studios on social media
Doc 3: Kong is a steel inverted roller coaster located at Six Flags Discovery Kingdom in Vallejo, California, USA. History. The ride originally opened
Doc 4: Kingda Ka roller coaster at Six Flags Great Adventure imploded to make way for new ride · Video shows Kingda Ka roller coaster being imploded.
Doc 5:  California, USA. STATISTICS: Six Flags Discovery Kingdom (Vallejo, California, USA) Opened: 5/1998 Roller Coaster, Steel, Inverted, Extreme