user: Question: Who did they play at Atlanta-Fulton County Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 17', 'Houston Oilers', 'W 30–17', 'Mile High Stadium', '1–0', 51656.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Game site" = 'Atlanta-Fulton County Stadium';