Table schema:
CREATE TABLE table_name_9 (erp_w INTEGER, frequency_mhz VARCHAR, city_of_license VARCHAR)

Question: Which ERP W is the highest one that has a Frequency MHz larger than 88.3, and a City of license of lewis, kansas?
SQL: SELECT MAX(erp_w) FROM table_name_9 WHERE frequency_mhz > 88.3 AND city_of_license = "lewis, kansas"