CREATE TABLE table_44405 ("Date" CLOB, "Opponent#" CLOB, "Site" CLOB, "Result" CLOB, "Attendance" CLOB)

At which site was Northwestern an opponent?
SELECT "Site" FROM table_44405 WHERE "Opponent#" = 'northwestern'
SELECT "Site" FROM "table_44405" WHERE "Opponent#" = 'northwestern'