CREATE TABLE table_59123 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Date" TEXT)

What is the Tie no when Crystal Palace is the Away team?
SELECT "Tie no" FROM table_59123 WHERE "Away team" = 'crystal palace'
SELECT "Tie no" FROM "table_59123" WHERE "Away team" = 'crystal palace'