user: Question: What date has Boston as the visitor?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['February 2', 'Montreal', '5–2', 'Vancouver', '15–31–5']
SQL:

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