CREATE TABLE table_68174 ("Year" FLOAT, "Fighter" CLOB, "Nation represented" CLOB, "Sport" CLOB, "Sanctioning body or league" CLOB, "Weight class represented or contested" CLOB)

Which nation won the boxing championship in 2012?
SELECT "Nation represented" FROM table_68174 WHERE "Year" = '2012'
SELECT "Nation represented" FROM "table_68174" WHERE "Year" = '2012'