CREATE TABLE table_18 ("Equivalent NATO Rank Code" TEXT, "Rank in Spanish" TEXT, "Rank in English" TEXT, "Commonwealth equivalent" TEXT, "US Air Force equivalent" TEXT)

What could a spanish coronel be addressed as in the commonwealth military?
SELECT "Commonwealth equivalent" FROM table_18 WHERE "Rank in Spanish" = 'Coronel'
SELECT "Commonwealth equivalent" FROM "table_18" WHERE "Rank in Spanish" = 'Coronel'