Are these baseball teams or football teams: Arizona Diamondbacks, Seattle Mariners, Pittsburg Pirates, and Houston Astros?
They are baseball teams.
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: Are these baseball teams or football teams: Arizona Diamondbacks, Seattle Mariners, Pittsburg Pirates, and Houston Astros?
### Input: 
### Response: They are baseball teams.