CREATE TABLE table_54305 ("Date" TEXT, "Score" TEXT, "Set 1" TEXT, "Set 2" TEXT, "Set 3" TEXT, "Total" TEXT)

What is the Set 3 with a Score of 3 1, and has a Set 2 of 13 15?
SELECT "Set 3" FROM table_54305 WHERE "Score" = '3–1' AND "Set 2" = '13–15'
SELECT "Set 3" FROM "table_54305" WHERE "Score" = '3–1' AND "Set 2" = '13–15'