user: Question: Who was the opponent at Lindsey Nelson Stadium?
Columns: ['Date', 'Opponent', 'Score', 'Site/Stadium', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['February 23', 'Murray State', '10-5', 'Dudy Noble Field', 'Donze', '6063', '1-0']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Site/Stadium" = 'Lindsey Nelson Stadium';