CREATE TABLE table_1015521_2 (us_air_force_equivalent VARCHAR2, commonwealth_equivalent VARCHAR2)

If you are a pilot officer in the commonwealth then what will you called as in the US air force?
SELECT us_air_force_equivalent FROM table_1015521_2 WHERE commonwealth_equivalent = "Pilot Officer"
SELECT "us_air_force_equivalent" FROM "table_1015521_2" WHERE "Pilot Officer" = "commonwealth_equivalent"