CREATE TABLE table_49239 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" FLOAT, "Class" CLOB, "FCC info" CLOB)

Which Class has a Frequency MHz larger than 91.7, and a Call sign of k272ec?
SELECT "Class" FROM table_49239 WHERE "Frequency MHz" > '91.7' AND "Call sign" = 'k272ec'
SELECT "Class" FROM "table_49239" WHERE "Call sign" = 'k272ec' AND "Frequency MHz" > '91.7'