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

### Instruction:
When was 10 (10) bought?

### Inputs:
table_name: table, columns: ['City of license /Market', 'Station', 'Channel TV ( DT )', 'Owned since', 'Primary affiliation']

### Response:
SELECT Owned since FROM table WHERE Channel TV ( DT ) = 10 (10)