user: Question: Which opponent plays on September 19?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['September 1', '@ Red Sox', '2–1', 'Lilly (11–12)', 36235.0, '69–66']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'September 19';