user: Question: What team was the opponent when there were 27,321 in attendance?
Columns: ['Date', 'Opponent', 'Site', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['September 7', 'East Tennessee State', 'Dowdy-Ficklen Stadium • Greenville, NC', 'W45–21', '25,512']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Attendance" = '27,321';