CREATE TABLE "translators" (
  "call_sign" text,
  "frequency_m_hz" real,
  "city_of_license" text,
  "erp_w" real,
  "class" text,
  "fcc_info" text
);

Question: What is the highest ERP W with a w216bo call sign?
SQL: SELECT MAX("erp_w") FROM "translators" WHERE "call_sign"='w216bo';