CREATE TABLE table_9765 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" FLOAT)

What was the attendance when they played at Dallas Cowboys?
SELECT "Attendance" FROM table_9765 WHERE "Opponent" = 'at dallas cowboys'
SELECT "Attendance" FROM "table_9765" WHERE "Opponent" = 'at dallas cowboys'