user: Question: What is the highest rank with the notes of SA/B, and a time of 6:39.07?
Columns: ['Rank', 'Rowers', 'Country', 'Time', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Pedro Fraga , Nuno Mendes', 'Portugal', '6:39.07', 'SA/B']
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Notes" = 'SA/B' AND "Time" = '6:39.07';