CREATE TABLE table_12318 ("Date" TEXT, "Score" TEXT, "Set 1" TEXT, "Set 2" TEXT, "Total" TEXT)

What is the Set 1 with set 2 at 21:17?
SELECT "Set 1" FROM table_12318 WHERE "Set 2" = '21:17'
SELECT "Set 1" FROM "table_12318" WHERE "Set 2" = '21:17'