Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_85 (class VARCHAR, vessel_name VARCHAR)

### Question ###
What is the class of vessel of the ship Hyundai Smart?

### Accurate SQL ###

SELECT class FROM table_name_85 WHERE vessel_name = "hyundai smart"