user: Question: What date was the game where the visiting team was Philadelphia?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Decision', 'Attendance', 'Series']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['April 22', 'Philadelphia', '2 – 3', 'Buffalo', 'Esche', 18690.0, 'Sabres lead 1–0']
SQL:

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