CREATE TABLE table_38568 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

Which Class has a Frequency MHz larger than 91.5, and a City of license of hyannis, nebraska?
SELECT "Class" FROM table_38568 WHERE "Frequency MHz" > '91.5' AND "City of license" = 'hyannis, nebraska'
SELECT "Class" FROM "table_38568" WHERE "City of license" = 'hyannis, nebraska' AND "Frequency MHz" > '91.5'