user: Question: How many people attended when opponent was twins?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['July 1', 'Red Sox', '4 - 0', 'Carpenter (7-5)', 34348.0, '38-43']
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "Opponent" = 'twins';