Instruction:
What is a baseball hat?

Response:
A baseball hat is a fabric hat with a bill on the front that shades the eyes from the sun. It is referred to as a baseball hat because all baseball players wear this style of hat while in the field playing defense, and they have their team’s logo on the front of the hat. Many people, however, refer to a hat as a baseball hat if it is a fabric material with a front bill, even if it does not have the logo of a baseball team on the front.