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

### Instruction:
What is the Overall Record when Since Beginning of Big 12 is ou, 27-3?

### Inputs:
table_name: table, columns: ['Oklahoma vs.', 'Overall Record', 'at Norman', "at Opponent's Venue", 'at Neutral Site', 'Last 5 Meetings', 'Last 10 Meetings', 'Current Streak', 'Since Beginning of Big 12']

### Response:
SELECT Overall Record FROM table WHERE Since Beginning of Big 12 = ou, 27-3