### Instruction: What is the most popular sport?
### Response: This depends on where you live, but football is one of the most popular sports in the world. In some countries, it is called soccer. Every 4 years countries assemble teams to see which is the best, and most countries have several leagues. Popular teams, such as real madrid, can garner fans from across the world. There are people who would even argue that football is more than just a sport.