CREATE TABLE table_38709 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" FLOAT, "Class" CLOB, "FCC info" CLOB)

Which ERP W is the lowest one that has a Call sign of w233be?
SELECT MIN("ERP W") FROM table_38709 WHERE "Call sign" = 'w233be'
SELECT MIN("ERP W") FROM "table_38709" WHERE "Call sign" = 'w233be'