What is the transfer fee when summer is the transfer window, the type is transfer and the country is Hun?
CREATE TABLE "in" (
  "name" text,
  "country" text,
  "type" text,
  "moving_from" text,
  "transfer_window" text,
  "ends" real,
  "transfer_fee" text,
  "source" text
);
SELECT "transfer_fee" FROM "in" WHERE "transfer_window"='summer' AND "type"='transfer' AND "country"='hun';