user: Question: Who is the opposing team when the game was played on the Shea Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Stadium', 'Result', 'Record', 'Streak', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Sept. 17', 'New York Jets', 'War Memorial Stadium', 'L 41–24', '0–1', 'L1', 46206.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Stadium" = 'Shea Stadium';