Table schema:
CREATE TABLE table_name_70 (set_3 VARCHAR, set_2 VARCHAR, set_1 VARCHAR)

Question: What is the Set 3 when the Set 2 is 21–25, and a Set 1 is 25–21?
SQL: SELECT set_3 FROM table_name_70 WHERE set_2 = "21–25" AND set_1 = "25–21"