CREATE TABLE table_5700 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Venue" CLOB, "Attendance" FLOAT)

Who was the opponent at memorial stadium?
SELECT "Opponent" FROM table_5700 WHERE "Venue" = 'memorial stadium'
SELECT "Opponent" FROM "table_5700" WHERE "Venue" = 'memorial stadium'