### Instruction: What is Wimbledon?
### Input: The Wimbledon Championships, commonly known simply as Wimbledon, is the oldest tennis tournament in the world and is widely regarded as the most prestigious. It has been held at the All England Club in Wimbledon, London, since 1877 and is played on outdoor grass courts, with retractable roofs over the two main courts since 2019.
### Response: The Wimbledon Championships is the oldest tennis tournament in the world. Commonly referred to as Wimbledon, it is one of the four Gran Slam tennis tournaments, alongside the Australian Open, the French Open, and the US Open.