CREATE TABLE table_39419 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

What class is assigned to frequencies larger than 89.3 with an ERP W of 250?
SELECT "Class" FROM table_39419 WHERE "Frequency MHz" > '89.3' AND "ERP W" = '250'
SELECT "Class" FROM "table_39419" WHERE "ERP W" = '250' AND "Frequency MHz" > '89.3'