CREATE TABLE table_33411 ("Vessel Name" CLOB, "Type" CLOB, "Built" FLOAT, "Class" CLOB, "Flag" CLOB)

What is the class of vessel of the ship Hyundai Smart?
SELECT "Class" FROM table_33411 WHERE "Vessel Name" = 'hyundai smart'
SELECT "Class" FROM "table_33411" WHERE "Vessel Name" = 'hyundai smart'