user: Question: what is the lowest qualifying rank?
Columns: ['Year', 'Competition', 'Location', 'Event', 'Final-Rank', 'Final-Score', 'Qualifying Rank', 'Qualifying Score']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [2008.0, '2008 Summer Olympics', 'Beijing', 'Team', '2', '186.525', 2.0, '246.800']
SQL:

assistant: SELECT MIN("Qualifying Rank") FROM "Table";