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_34 (class VARCHAR, prom__m_ VARCHAR, peak VARCHAR)

### Question ###
Which Class is Peak Sail when it has a Prom larger than 30?

### Accurate SQL ###

SELECT class FROM table_name_34 WHERE prom__m_ > 30 AND peak = "sail"