CREATE TABLE table_name_6 (set_1 VARCHAR, set_2 VARCHAR, set_3 VARCHAR)

What is the Set 1 with a Set 2 of 15 5, and a Set 3 with 15 3?
SELECT set_1 FROM table_name_6 WHERE set_2 = "15–5" AND set_3 = "15–3"
SELECT "set_1" FROM "table_name_6" WHERE "15–3" = "set_3" AND "15–5" = "set_2"