user: Question: When did a Position of 21st (q) happen?
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1998.0, 'World Junior Championships', 'Annecy , France', '6th', '57.73 m']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Position" = '21st (q)';