CREATE TABLE table_49314 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

What was the Opponent on August 31, 1997?
SELECT "Opponent" FROM table_49314 WHERE "Date" = 'august 31, 1997'
SELECT "Opponent" FROM "table_49314" WHERE "Date" = 'august 31, 1997'