CREATE TABLE table_name_54 (class VARCHAR(255), call_sign VARCHAR(255), erp_w VARCHAR(255), frequency_mhz VARCHAR(255))
Which Class has a ERP W larger than 205, and a Frequency MHz smaller than 93.9, and a Call sign of k210cb?
    
SQL: SELECT class FROM table_name_54 WHERE erp_w > 205 AND frequency_mhz < 93.9 AND call_sign = "k210cb"