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

### Instruction:
How many cable channels have callsign CBFT-DT?

### Inputs:
table_name: table, columns: ['Call sign', 'Broadcast channel', 'Digital PSIP', 'Cable channel', 'Network']

### Response:
SELECT COUNT Cable channel FROM table WHERE Call sign = cbft-dt