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

### Instruction:
What affiliation has an owned since larger than 1991, and also has a channel (tv/rf) of 42?

### Inputs:
table_name: table, columns: ['City of license /Market', 'Station', 'Channel ( TV / RF )', 'Owned Since', 'Affiliation']

### Response:
SELECT Affiliation FROM table WHERE Owned Since > 1991 AND Channel ( TV / RF ) = 42