user: Question: Which visitor visited on February 21?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Decision', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['February 1', 'Buffalo', '4 – 5', 'Atlanta', 'Lehtonen', '25–25–4']
SQL:

assistant: SELECT "Visitor" FROM "Table" WHERE "Date" = 'February 21';