Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which institution's nickname is the Polar Bears?

### Inputs:
table_name: table, columns: ['Institution', 'Location', 'Nickname', 'Founded', 'Founding Religious Affiliation', 'Enrollment', 'Joined']

### Response:
SELECT Institution FROM table WHERE Nickname = Polar Bears