user: Question: What is the Overall Record when Since Beginning of Big 12 is OU, 27-3?
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']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Baylor', 'OU, 36-8', 'OU, 18-3', 'OU, 16-4', 'OU, 2-1', 'BU, 3-2', 'OU, 7-3', 'W 3', 'OU, 27-3']
SQL:

assistant: SELECT "Overall Record" FROM "Table" WHERE "Since Beginning of Big 12" = 'OU, 27-3';