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

### Instruction:
What is the call sign for country station fm 93.1?

### Inputs:
table_name: table, columns: ['Frequency', 'Call sign', 'Branding', 'Format', 'Owner']

### Response:
SELECT Call sign FROM table WHERE Format = country AND Frequency = fm 93.1