What is the city of license with an ERP W less than 170?
CREATE TABLE "broadcast_translators_of_kanz" (
  "call_sign" text,
  "frequency_m_hz" real,
  "city_of_license" text,
  "erp_w" real,
  "class" text,
  "fcc_info" text
);
SELECT "city_of_license" FROM "broadcast_translators_of_kanz" WHERE "erp_w"<170;