user: Question: what is the since beginning of big 12 when last 10 meetings is OU, 7-3, neutral site is OU, 2-1, and last 5 meetings is BU, 3-2?
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 "Since Beginning of Big 12" FROM "Table" WHERE "Last 10 Meetings" = 'OU, 7-3' AND "at Neutral Site" = 'OU, 2-1' AND "Last 5 Meetings" = 'BU, 3-2';