user: Question: Whice race ended with a DNF?
Columns: ['Race', 'Position', 'Time', 'Speed', 'Replica']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Superbike', '3rd', '01:46:59.69', '126.948', 'Silver']
SQL:

assistant: SELECT "Race" FROM "Table" WHERE "Position" = 'DNF';