user: Question: What's the minimal rank of a athlete shown in the chart?
Columns: ['Rank', 'Athlete', 'Nation', 'Olympics', 'Gold', 'Silver', 'Bronze', 'Total(min. 2 medals)']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Usain Bolt Category:Articles with hCards', 'Jamaica (JAM)', '2008–2012', 2.0, 0.0, 0.0, 2.0]
SQL:

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