user: Question: At what Location was the Runner-up TBD?
Columns: ['Year', 'National Champion', 'Runner-Up', 'Location', 'Host']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1989–1990', 'Penn State', 'Iowa State', 'Athens, OH', 'Ohio University']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Runner-Up" = 'TBD';