CREATE TABLE table_79186 ("Tie no" CLOB, "Home team" CLOB, "Score" CLOB, "Away team" CLOB, "Date" CLOB)

For which tie was Scunthorpe United the away team?
SELECT "Tie no" FROM table_79186 WHERE "Away team" = 'scunthorpe united'
SELECT "Tie no" FROM "table_79186" WHERE "Away team" = 'scunthorpe united'