What are the three biggest cities by population in Spain?
The three biggest cities by population in Spain are Madrid, Barcelona, and Valencia.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What are the three biggest cities by population in Spain?
### Input: 
### Response: The three biggest cities by population in Spain are Madrid, Barcelona, and Valencia.