user: Question: Who was the visitor on October 31?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['October 24', 'Chicago Black Hawks', '5–4', 'Boston Bruins', '1–0–0']
SQL:

assistant: SELECT "Visitor" FROM "Table" WHERE "Date" = 'October 31';