user: Question: Who did the Giants play before week 7 in Tulane Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '1970-09-19', 'Chicago Bears', 'L 24–16', 'Yankee Stadium', 62936.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" < 7.0 AND "Game site" = 'Tulane Stadium';