user: Question: How many bids were there for the .500 win percentage in the Ohio Valley conference?
Columns: ['Conference', '# of Bids', 'Record', 'Win %', 'Round of 32', 'Sweet Sixteen', 'Elite Eight', 'Final Four', 'Championship Game']
Types: ['text', 'real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Southeastern', 6.0, '13–5', '.722', '5', '4', '3', '2', '2']
SQL:

assistant: SELECT "# of Bids" FROM "Table" WHERE "Win %" = '.500' AND "Conference" = 'Ohio Valley';