CREATE TABLE "wales" (
  "cap_number" real,
  "date" text,
  "position" text,
  "shirt_number" real,
  "home_or_away" text,
  "venue" text,
  "result" text,
  "score" text
);

Question: What's the largest shirt number when the cap number is 5?
SQL: SELECT MAX("shirt_number") FROM "wales" WHERE "cap_number"=5;