user: Question: What is the rank of the time of 6:30.53?
Columns: ['Rank', 'Rowers', 'Country', 'Time', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Dimitrios Mougios , Vasileios Polymeros', 'Greece', '6:24.61', 'FA']
SQL:

assistant: SELECT "Rank" FROM "Table" WHERE "Time" = '6:30.53';