user: Question: What is Sun Yang's lowest rank?
Columns: ['Rank', 'Heat : Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '5 : 4', 'Craig Stevens', 'Australia', '7:50.72']
SQL:

assistant: SELECT MIN("Rank") FROM "Table" WHERE "Name" = 'Sun Yang';