user: Question: Which rank took place prior to 2000 when the bike was BSL?
Columns: ['Year', 'Class', 'Bike', 'Rank', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1998.0, '500cc', 'Suzuki', '33rd', 2.0]
SQL:

assistant: SELECT "Rank" FROM "Table" WHERE "Year" < 2000.0 AND "Bike" = 'BSL';