user: Question: What city was a visitor on the date of April 30?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['April 22', 'Ottawa', '2 – 1 (OT)', 'New Jersey', '1 – 0']
SQL:

assistant: SELECT "Visitor" FROM "Table" WHERE "Date" = 'April 30';