CREATE TABLE table_11318462_5 (u15_3rd_iv VARCHAR2, u15_4th_iv VARCHAR2)

what are all the u15 3rd iv with u15 4th iv being bbc
SELECT u15_3rd_iv FROM table_11318462_5 WHERE u15_4th_iv = "BBC"
SELECT "u15_3rd_iv" FROM "table_11318462_5" WHERE "BBC" = "u15_4th_iv"