CREATE TABLE "first_team" (
  "exit_date" text,
  "pos" text,
  "player" text,
  "to_club" text,
  "transfer_fee" text
);

Question: What club received a DF player for free?
SQL: SELECT "to_club" FROM "first_team" WHERE "transfer_fee"='free' AND "pos"='df';

Question: Which player was transferred to Reggina?
SQL: SELECT "player" FROM "first_team" WHERE "to_club"='reggina';

Question: What is the exit date of the player transferred to Reggina for free?
SQL: SELECT "exit_date" FROM "first_team" WHERE "transfer_fee"='free' AND "to_club"='reggina';