user: Question: What is the highest rank for the team that raced a time of 6:50.40?
Columns: ['Rank', 'Athlete', 'Country', 'Time', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Mahé Drysdale', 'New Zealand', '6:50.18', 'SA/B']
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Time" = '6:50.40';