CREATE TABLE table_51200 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" FLOAT, "Class" CLOB, "FCC info" CLOB)

What is the highest ERP W of the translator with a call sign of w284av?
SELECT MAX("ERP W") FROM table_51200 WHERE "Call sign" = 'w284av'
SELECT MAX("ERP W") FROM "table_51200" WHERE "Call sign" = 'w284av'