user: Question: What is the Visitor of the game with a Record of 21–17–13?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['October 14', 'Chicago Black Hawks', '3–3', 'Detroit Red Wings', '0–0–1']
SQL:

assistant: SELECT "Visitor" FROM "Table" WHERE "Record" = '21–17–13';