Which Class has a Frequency MHz larger than 91.7, and a Call sign of k272ec?
CREATE TABLE "translators" (
  "call_sign" text,
  "frequency_m_hz" real,
  "city_of_license" text,
  "erp_w" real,
  "class" text,
  "fcc_info" text
);
SELECT "class" FROM "translators" WHERE "frequency_m_hz">91.7 AND "call_sign"='k272ec';